Advanced Age Calculator<\/title>\n <style>\n body {\n font-family: Arial, sans-serif;\n background-color: #f0f8ff;\n color: #333;\n padding: 30px;\n }\n .container {\n background-color: white;\n padding: 25px;\n border-radius: 10px;\n box-shadow: 0 0 15px rgba(0, 0, 0, 0.15);\n max-width: 500px;\n margin: auto;\n }\n h2 {\n color: #2e8b57;\n }\n label {\n font-weight: bold;\n }\n input[type=\"date\"] {\n padding: 8px;\n margin: 10px 0;\n width: 220px;\n font-size: 16px;\n }\n button {\n padding: 10px 20px;\n background-color: #2e8b57;\n color: white;\n border: none;\n cursor: pointer;\n font-weight: bold;\n font-size: 16px;\n }\n button:hover {\n background-color: #1e6843;\n }\n #result {\n margin-top: 20px;\n font-size: 18px;\n color: #006699;\n font-weight: bold;\n }\n <\/style>\n<\/head>\n<body>\n <div class=\"container\">\n <h2>\ud83d\udd52 Advanced Age Calculator<\/h2>\n <label for=\"dob\">Select Your Date of Birth:<\/label><br>\n <input type=\"date\" id=\"dob\"><br><br>\n <button onclick=\"calculateAge()\">Calculate Full Age<\/button>\n <div id=\"result\"><\/div>\n <\/div>\n\n <script>\n function calculateAge() {\n const dobInput = document.getElementById(\"dob\").value;\n if (!dobInput) {\n document.getElementById(\"result\").innerHTML = \"\u2757 Please select your date of birth.\";\n return;\n }\n\n const dob = new Date(dobInput);\n const now = new Date();\n\n if (dob > now) {\n document.getElementById(\"result\").innerHTML = \"\u2757 Date of birth cannot be in the future.\";\n return;\n }\n\n const diffMs = now - dob;\n const totalDays = Math.floor(diffMs \/ (1000 * 60 * 60 * 24)); \/\/ Total days\n\n let years = now.getFullYear() - dob.getFullYear();\n let months = now.getMonth() - dob.getMonth();\n let days = now.getDate() - dob.getDate();\n let hours = now.getHours() - dob.getHours();\n let minutes = now.getMinutes() - dob.getMinutes();\n let seconds = now.getSeconds() - dob.getSeconds();\n\n if (seconds < 0) {\n seconds += 60;\n minutes--;\n }\n\n if (minutes < 0) {\n minutes += 60;\n hours--;\n }\n\n if (hours < 0) {\n hours += 24;\n days--;\n }\n\n if (days < 0) {\n months--;\n const prevMonth = new Date(now.getFullYear(), now.getMonth(), 0).getDate();\n days += prevMonth;\n }\n\n if (months < 0) {\n months += 12;\n years--;\n }\n\n document.getElementById(\"result\").innerHTML =\n `\ud83c\udf82 You are <strong>${years}<\/strong> years, <strong>${months}<\/strong> months, <strong>${days}<\/strong> days,<br>\n <strong>${hours}<\/strong> hours, <strong>${minutes}<\/strong> minutes, <strong>${seconds}<\/strong> seconds old.<br><br>\n \ud83d\udcc6 <strong>Total Days:<\/strong> ${totalDays} days`;\n }\n <\/script>\n<\/body>\n<\/html>\n\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center has-tan-color has-blue-background-color has-text-color has-background has-link-color wp-elements-b3f51a848f5c327873f445be1e7d27d9\"><strong>ENGLISH<\/strong><\/h2>\n\n\n\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n <meta charset=\"UTF-8\">\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n <title>Metals & Non-Metals Quiz<\/title>\n <style>\n body {\n font-family: Arial, sans-serif;\n background: linear-gradient(135deg, #74ebd5, #9face6);\n margin: 0;\n padding: 20px;\n text-align: center;\n }\n .quiz-container {\n background: #fff;\n border-radius: 15px;\n padding: 20px;\n max-width: 700px;\n margin: auto;\n box-shadow: 0 4px 8px rgba(0,0,0,0.2);\n }\n .hidden { display: none; }\n .question { font-size: 18px; margin-bottom: 15px; }\n .options label {\n display: block;\n text-align: left;\n padding: 10px;\n border-radius: 8px;\n margin: 5px 0;\n cursor: pointer;\n border: 1px solid #ccc;\n }\n .options input { margin-right: 10px; }\n button {\n padding: 10px 20px;\n margin: 10px;\n border: none;\n border-radius: 8px;\n cursor: pointer;\n background: #1e88e5;\n color: white;\n font-size: 16px;\n }\n button:hover { background: #1565c0; }\n #scoreboard {\n margin-top: 20px;\n text-align: left;\n }\n #scoreboard h3 { margin-bottom: 10px; }\n table {\n width: 100%;\n border-collapse: collapse;\n }\n th, td {\n padding: 8px;\n border-bottom: 1px solid #ccc;\n text-align: center;\n }\n <\/style>\n<\/head>\n<body>\n <div class=\"quiz-container\">\n <h2>\u26a1 Metals & Non-Metals Quiz<\/h2>\n <div id=\"start-screen\">\n <p>Enter your name to begin:<\/p>\n <input type=\"text\" id=\"username\" placeholder=\"Your Name\">\n <br><br>\n <button onclick=\"startQuiz()\">Start Quiz<\/button>\n <\/div>\n\n <div id=\"quiz-screen\" class=\"hidden\">\n <p id=\"question-number\"><\/p>\n <div id=\"question\" class=\"question\"><\/div>\n <div id=\"options\" class=\"options\"><\/div>\n <button onclick=\"prevQuestion()\">Previous<\/button>\n <button onclick=\"nextQuestion()\">Next<\/button>\n <br>\n <button onclick=\"submitQuiz()\">Submit Quiz<\/button>\n <\/div>\n\n <div id=\"result-screen\" class=\"hidden\">\n <h3 id=\"result\"><\/h3>\n <button onclick=\"restartQuiz()\">Try Again<\/button>\n <\/div>\n\n <div id=\"scoreboard\">\n <h3>\ud83c\udfc6 Scoreboard<\/h3>\n <table>\n <thead>\n <tr><th>Name<\/th><th>Score<\/th><\/tr>\n <\/thead>\n <tbody id=\"scoreboard-body\"><\/tbody>\n <\/table>\n <\/div>\n <\/div>\n\n <script>\n const questions = [\n \/\/ ---------------- EASY (10) ----------------\n { q: \"Metals are generally:\", options: [\"Good conductors of heat and electricity\",\"Poor conductors of heat\",\"Brittle\",\"Liquid at room temperature\"], answer: 0 },\n { q: \"Which of the following is a non-metal but lustrous?\", options: [\"Phosphorus\",\"Iodine\",\"Sulphur\",\"Carbon (coal)\"], answer: 1 },\n { q: \"The most ductile metal is:\", options: [\"Copper\",\"Silver\",\"Gold\",\"Aluminium\"], answer: 2 },\n { q: \"Which non-metal exists in liquid state?\", options: [\"Chlorine\",\"Bromine\",\"Iodine\",\"Oxygen\"], answer: 1 },\n { q: \"Metals generally form which type of oxides?\", options: [\"Acidic\",\"Basic\",\"Neutral\",\"All of the above\"], answer: 1 },\n { q: \"When metals react with acids, they release:\", options: [\"Oxygen\",\"Hydrogen\",\"Nitrogen\",\"Carbon dioxide\"], answer: 1 },\n { q: \"Silver reacts with sulphur in the air to form:\", options: [\"Silver chloride\",\"Silver sulphide\",\"Silver oxide\",\"Silver carbonate\"], answer: 1 },\n { q: \"Which metal does not corrode easily?\", options: [\"Copper\",\"Iron\",\"Aluminium\",\"Gold\"], answer: 3 },\n { q: \"The process of coating iron with zinc is called:\", options: [\"Alloying\",\"Galvanising\",\"Anodising\",\"Chrome plating\"], answer: 1 },\n { q: \"Which alloy is used for soldering wires?\", options: [\"Brass\",\"Bronze\",\"Solder (Lead + Tin)\",\"Steel\"], answer: 2 },\n\n \/\/ ---------------- MEDIUM (5) ----------------\n { q: \"Which oxide is amphoteric?\", options: [\"ZnO\",\"CaO\",\"Na\u2082O\",\"CO\u2082\"], answer: 0 },\n { q: \"The general electronic configuration of metals is:\", options: [\"1\u20133 electrons in outermost shell\",\"5\u20137 electrons in outermost shell\",\"8 electrons in outermost shell\",\"4 electrons in outermost shell\"], answer: 0 },\n { q: \"Which of the following reactions is a displacement reaction?\", options: [\"Cu + 2AgNO\u2083 \u2192 Cu(NO\u2083)\u2082 + 2Ag\",\"2Mg + O\u2082 \u2192 2MgO\",\"CaCO\u2083 \u2192 CaO + CO\u2082\",\"NaCl \u2192 Na + Cl\u2082\"], answer: 0 },\n { q: \"Which gas is formed when zinc reacts with dilute hydrochloric acid?\", options: [\"Oxygen\",\"Nitrogen\",\"Hydrogen\",\"Carbon dioxide\"], answer: 2 },\n { q: \"Which of the following is not an alloy?\", options: [\"Brass\",\"Bronze\",\"Solder\",\"Quartz\"], answer: 3 },\n\n \/\/ ---------------- TOUGH (10) ----------------\n { q: \"Which metal reacts vigorously with cold water?\", options: [\"Magnesium\",\"Calcium\",\"Sodium\",\"Aluminium\"], answer: 2 },\n { q: \"The reaction of Zn with steam forms:\", options: [\"ZnO + H\u2082\",\"Zn(OH)\u2082\",\"ZnCl\u2082 + H\u2082\",\"Zn + H\u2082O\u2082\"], answer: 0 },\n { q: \"The green coating on copper articles is due to:\", options: [\"Copper oxide\",\"Copper sulphide\",\"Copper carbonate\",\"Copper nitrate\"], answer: 2 },\n { q: \"Electrolytic reduction is used for extracting:\", options: [\"Iron\",\"Zinc\",\"Aluminium\",\"Copper\"], answer: 2 },\n { q: \"Which one is extracted from cinnabar ore?\", options: [\"Silver\",\"Copper\",\"Mercury\",\"Aluminium\"], answer: 2 },\n { q: \"The pure metal is deposited on which electrode during electrolytic refining?\", options: [\"Anode\",\"Cathode\",\"Both\",\"Electrolyte\"], answer: 1 },\n { q: \"Identify the incorrect pair:\", options: [\"Brass \u2013 Copper + Zinc\",\"Bronze \u2013 Copper + Tin\",\"Stainless steel \u2013 Iron + Nickel + Chromium\",\"Amalgam \u2013 Copper + Aluminium\"], answer: 3 },\n { q: \"Which of the following is used in thermite welding?\", options: [\"Al + ZnO\",\"Al + Fe\u2082O\u2083\",\"Mg + CuO\",\"Zn + CuSO\u2084\"], answer: 1 },\n { q: \"Which is the most reactive metal?\", options: [\"Copper\",\"Silver\",\"Potassium\",\"Iron\"], answer: 2 },\n { q: \"Ionic compounds conduct electricity in:\", options: [\"Solid state only\",\"Molten state and aqueous solution\",\"Both solid and molten state\",\"Only solid state\"], answer: 1 }\n ];\n\n let currentQuestion = 0;\n let userAnswers = [];\n let score = 0;\n let username = \"\";\n\n function startQuiz() {\n username = document.getElementById(\"username\").value.trim();\n if (!username) { alert(\"Please enter your name\"); return; }\n document.getElementById(\"start-screen\").classList.add(\"hidden\");\n document.getElementById(\"quiz-screen\").classList.remove(\"hidden\");\n showQuestion();\n }\n\n function showQuestion() {\n document.getElementById(\"question-number\").innerText =\n `Question ${currentQuestion+1} of ${questions.length}`;\n document.getElementById(\"question\").innerText =\n questions[currentQuestion].q;\n const optionsDiv = document.getElementById(\"options\");\n optionsDiv.innerHTML = \"\";\n questions[currentQuestion].options.forEach((opt, i) => {\n const label = document.createElement(\"label\");\n const input = document.createElement(\"input\");\n input.type = \"radio\";\n input.name = \"option\";\n input.value = i;\n if (userAnswers[currentQuestion] == i) input.checked = true;\n label.appendChild(input);\n label.appendChild(document.createTextNode(opt));\n optionsDiv.appendChild(label);\n });\n }\n\n function nextQuestion() {\n saveAnswer();\n if (currentQuestion < questions.length - 1) {\n currentQuestion++;\n showQuestion();\n }\n }\n\n function prevQuestion() {\n saveAnswer();\n if (currentQuestion > 0) {\n currentQuestion--;\n showQuestion();\n }\n }\n\n function saveAnswer() {\n const selected = document.querySelector('input[name=\"option\"]:checked');\n if (selected) userAnswers[currentQuestion] = parseInt(selected.value);\n }\n\n function submitQuiz() {\n saveAnswer();\n score = 0;\n userAnswers.forEach((ans, i) => {\n if (ans === questions[i].answer) score++;\n });\n document.getElementById(\"quiz-screen\").classList.add(\"hidden\");\n document.getElementById(\"result-screen\").classList.remove(\"hidden\");\n document.getElementById(\"result\").innerText =\n `${username}, your score is ${score}\/${questions.length}`;\n\n updateScoreboard(username, score);\n }\n\n function updateScoreboard(name, score) {\n let scoreboard = JSON.parse(localStorage.getItem(\"scoreboard\")) || [];\n scoreboard.push({ name, score });\n scoreboard.sort((a,b) => b.score - a.score);\n localStorage.setItem(\"scoreboard\", JSON.stringify(scoreboard));\n renderScoreboard();\n }\n\n function renderScoreboard() {\n let scoreboard = JSON.parse(localStorage.getItem(\"scoreboard\")) || [];\n const tbody = document.getElementById(\"scoreboard-body\");\n tbody.innerHTML = \"\";\n scoreboard.forEach(entry => {\n const row = `<tr><td>${entry.name}<\/td><td>${entry.score}<\/td><\/tr>`;\n tbody.innerHTML += row;\n });\n }\n\n function restartQuiz() {\n currentQuestion = 0;\n userAnswers = [];\n score = 0;\n document.getElementById(\"result-screen\").classList.add(\"hidden\");\n document.getElementById(\"quiz-screen\").classList.remove(\"hidden\");\n showQuestion();\n }\n\n window.onload = renderScoreboard;\n <\/script>\n<\/body>\n<\/html>\n\n\n\n\n\n\n\n\n<!DOCTYPE html>\n<html lang=\"hi\">\n<head>\n <meta charset=\"UTF-8\" \/>\n <title>\u0927\u093e\u0924\u0941\u090f\u0901 \u0914\u0930 \u0905\u0927\u093e\u0924\u0941\u090f\u0901 – \u0915\u0915\u094d\u0937\u093e 10 MCQ \u0915\u094d\u0935\u093f\u091c\u093c<\/title>\n <style>\n body {\n font-family: Arial, sans-serif;\n margin: 20px;\n background: linear-gradient(135deg,#f0f7ff,#f7fff2);\n }\n .container {\n max-width: 900px;\n margin: auto;\n background: white;\n padding: 18px 22px;\n border-radius: 10px;\n box-shadow: 0 6px 18px rgba(0,0,0,0.08);\n }\n h1 { text-align: center; color: #0b5; margin-top: 0; }\n label.name { display:block; margin-bottom: 8px; font-weight:600; }\n input[type=\"text\"] {\n width: 60%;\n padding: 8px;\n border-radius: 6px;\n border: 1px solid #ccc;\n margin-bottom: 14px;\n }\n .question {\n border-radius: 8px;\n padding: 12px;\n margin-bottom: 12px;\n background: #fff;\n border: 1px solid #e6e6e6;\n }\n .question h3 {\n margin: 0 0 8px 0;\n font-size: 16px;\n color: #333;\n }\n .options label {\n display:block;\n padding: 8px;\n border-radius: 6px;\n margin: 6px 0;\n cursor: pointer;\n border: 1px solid transparent;\n }\n .options input { margin-right: 8px; }\n .correct { background: #dff7dc !important; border-color:#8dd39c !important; }\n .incorrect { background: #ffdfe0 !important; border-color:#ff9ea8 !important; }\n .correct-answer {\n display:block;\n margin-top: 8px;\n font-size:14px;\n color: #005500;\n font-weight:600;\n }\n .controls {\n text-align:center;\n margin: 14px 0 8px;\n }\n button {\n padding: 10px 16px;\n margin: 6px;\n border-radius: 8px;\n border: none;\n cursor: pointer;\n font-weight: 600;\n }\n button#checkBtn { background:#1976d2; color:white; }\n button#clearBtn { background:#e53935; color:white; }\n #result {\n margin-top: 10px;\n font-size: 18px;\n font-weight:700;\n text-align:center;\n }\n #scoreboard {\n margin-top: 18px;\n background: #fafafa;\n padding: 12px;\n border-radius: 8px;\n border: 1px solid #eee;\n }\n table { width:100%; border-collapse: collapse; margin-top:8px; }\n th, td { padding:8px; border-bottom: 1px solid #eee; text-align:center; }\n th { background:#f2f2f2; }\n .muted { color:#666; font-size:13px; }\n <\/style>\n<\/head>\n<body>\n <div class=\"container\">\n <h1>\u0915\u0915\u094d\u0937\u093e 10 \u2014 \u0927\u093e\u0924\u0941\u090f\u0901 \u0914\u0930 \u0905\u0927\u093e\u0924\u0941\u090f\u0901 (25 MCQs)<\/h1>\n\n <label class=\"name\">\u0905\u092a\u0928\u093e \u0928\u093e\u092e \u0926\u0930\u094d\u091c \u0915\u0930\u0947\u0902:<\/label>\n <input type=\"text\" id=\"username\" placeholder=\"\u0905\u092a\u0928\u093e \u0928\u093e\u092e \u0932\u093f\u0916\u0947\u0902\">\n\n <form id=\"quizForm\">\n \n <div class=\"question\" id=\"div-q1\">\n <h3>\u092a\u094d\u09301. \u0927\u093e\u0924\u0941\u090f\u0901 \u0938\u093e\u092e\u093e\u0928\u094d\u092f\u0924\u0903 \u0939\u094b\u0924\u0940 \u0939\u0948\u0902:<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q1\" value=\"a\"> a) \u090a\u0937\u094d\u092e\u093e \u0914\u0930 \u0935\u093f\u0926\u094d\u092f\u0941\u0924 \u0915\u0940 \u0905\u091a\u094d\u091b\u0940 \u0938\u0941\u091a\u093e\u0932\u0915<\/label>\n <label><input type=\"radio\" name=\"q1\" value=\"b\"> b) \u090a\u0937\u094d\u092e\u093e \u0915\u0940 \u0916\u0930\u093e\u092c \u0938\u0941\u091a\u093e\u0932\u0915<\/label>\n <label><input type=\"radio\" name=\"q1\" value=\"c\"> c) \u092d\u0902\u0917\u0941\u0930<\/label>\n <label><input type=\"radio\" name=\"q1\" value=\"d\"> d) \u0915\u092e\u0930\u0947 \u0915\u0947 \u0924\u093e\u092a\u092e\u093e\u0928 \u092a\u0930 \u0926\u094d\u0930\u0935<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q2\">\n <h3>\u092a\u094d\u09302. \u0928\u093f\u092e\u094d\u0928\u0932\u093f\u0916\u093f\u0924 \u092e\u0947\u0902 \u0938\u0947 \u0915\u094c\u0928-\u0938\u093e \u0905\u0927\u093e\u0924\u0941 \u091a\u092e\u0915\u0940\u0932\u093e \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q2\" value=\"a\"> a) \u092b\u0949\u0938\u094d\u092b\u094b\u0930\u0938<\/label>\n <label><input type=\"radio\" name=\"q2\" value=\"b\"> b) \u0906\u092f\u094b\u0921\u0940\u0928<\/label>\n <label><input type=\"radio\" name=\"q2\" value=\"c\"> c) \u0917\u0902\u0927\u0915<\/label>\n <label><input type=\"radio\" name=\"q2\" value=\"d\"> d) \u0915\u093e\u0930\u094d\u092c\u0928 (\u0915\u094b\u092f\u0932\u093e)<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q3\">\n <h3>\u092a\u094d\u09303. \u0938\u092c\u0938\u0947 \u0905\u0927\u093f\u0915 \u0924\u0928\u094d\u092f \u0927\u093e\u0924\u0941 \u0915\u094c\u0928-\u0938\u0940 \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q3\" value=\"a\"> a) \u0924\u093e\u0901\u092c\u093e<\/label>\n <label><input type=\"radio\" name=\"q3\" value=\"b\"> b) \u091a\u093e\u0901\u0926\u0940<\/label>\n <label><input type=\"radio\" name=\"q3\" value=\"c\"> c) \u0938\u094b\u0928\u093e<\/label>\n <label><input type=\"radio\" name=\"q3\" value=\"d\"> d) \u090f\u0932\u094d\u092f\u0941\u092e\u093f\u0928\u093f\u092f\u092e<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q4\">\n <h3>\u092a\u094d\u09304. \u0915\u094c\u0928-\u0938\u093e \u0905\u0927\u093e\u0924\u0941 \u0926\u094d\u0930\u0935 \u0905\u0935\u0938\u094d\u0925\u093e \u092e\u0947\u0902 \u092a\u093e\u092f\u093e \u091c\u093e\u0924\u093e \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q4\" value=\"a\"> a) \u0915\u094d\u0932\u094b\u0930\u0940\u0928<\/label>\n <label><input type=\"radio\" name=\"q4\" value=\"b\"> b) \u092c\u094d\u0930\u094b\u092e\u0940\u0928<\/label>\n <label><input type=\"radio\" name=\"q4\" value=\"c\"> c) \u0906\u092f\u094b\u0921\u0940\u0928<\/label>\n <label><input type=\"radio\" name=\"q4\" value=\"d\"> d) \u0911\u0915\u094d\u0938\u0940\u091c\u0928<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q5\">\n <h3>\u092a\u094d\u09305. \u0927\u093e\u0924\u0941\u090f\u0901 \u0938\u093e\u092e\u093e\u0928\u094d\u092f\u0924\u0903 \u0915\u093f\u0938 \u092a\u094d\u0930\u0915\u093e\u0930 \u0915\u0947 \u0911\u0915\u094d\u0938\u093e\u0907\u0921 \u092c\u0928\u093e\u0924\u0940 \u0939\u0948\u0902?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q5\" value=\"a\"> a) \u0905\u092e\u094d\u0932\u0940\u092f<\/label>\n <label><input type=\"radio\" name=\"q5\" value=\"b\"> b) \u0915\u094d\u0937\u093e\u0930\u0940\u092f<\/label>\n <label><input type=\"radio\" name=\"q5\" value=\"c\"> c) \u0909\u0926\u093e\u0938\u0940\u0928<\/label>\n <label><input type=\"radio\" name=\"q5\" value=\"d\"> d) \u0909\u092a\u0930\u094b\u0915\u094d\u0924 \u0938\u092d\u0940<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q6\">\n <h3>\u092a\u094d\u09306. \u091c\u092c \u0927\u093e\u0924\u0941\u090f\u0901 \u0905\u092e\u094d\u0932\u094b\u0902 \u0915\u0947 \u0938\u093e\u0925 \u0905\u092d\u093f\u0915\u094d\u0930\u093f\u092f\u093e \u0915\u0930\u0924\u0940 \u0939\u0948\u0902, \u0924\u094b \u0915\u094c\u0928-\u0938\u0940 \u0917\u0948\u0938 \u0928\u093f\u0915\u0932\u0924\u0940 \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q6\" value=\"a\"> a) \u0911\u0915\u094d\u0938\u0940\u091c\u0928<\/label>\n <label><input type=\"radio\" name=\"q6\" value=\"b\"> b) \u0939\u093e\u0907\u0921\u094d\u0930\u094b\u091c\u0928<\/label>\n <label><input type=\"radio\" name=\"q6\" value=\"c\"> c) \u0928\u093e\u0907\u091f\u094d\u0930\u094b\u091c\u0928<\/label>\n <label><input type=\"radio\" name=\"q6\" value=\"d\"> d) \u0915\u093e\u0930\u094d\u092c\u0928 \u0921\u093e\u0907\u0911\u0915\u094d\u0938\u093e\u0907\u0921<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q7\">\n <h3>\u092a\u094d\u09307. \u091a\u093e\u0901\u0926\u0940 \u0939\u0935\u093e \u092e\u0947\u0902 \u0917\u0902\u0927\u0915 \u0915\u0947 \u0938\u093e\u0925 \u0905\u092d\u093f\u0915\u094d\u0930\u093f\u092f\u093e \u0915\u0930\u0915\u0947 \u0915\u094d\u092f\u093e \u092c\u0928\u093e\u0924\u0940 \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q7\" value=\"a\"> a) \u0938\u093f\u0932\u094d\u0935\u0930 \u0915\u094d\u0932\u094b\u0930\u093e\u0907\u0921<\/label>\n <label><input type=\"radio\" name=\"q7\" value=\"b\"> b) \u0938\u093f\u0932\u094d\u0935\u0930 \u0938\u0932\u094d\u092b\u093c\u093e\u0907\u0921<\/label>\n <label><input type=\"radio\" name=\"q7\" value=\"c\"> c) \u0938\u093f\u0932\u094d\u0935\u0930 \u0911\u0915\u094d\u0938\u093e\u0907\u0921<\/label>\n <label><input type=\"radio\" name=\"q7\" value=\"d\"> d) \u0938\u093f\u0932\u094d\u0935\u0930 \u0915\u093e\u0930\u094d\u092c\u094b\u0928\u0947\u091f<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q8\">\n <h3>\u092a\u094d\u09308. \u0928\u093f\u092e\u094d\u0928\u0932\u093f\u0916\u093f\u0924 \u092e\u0947\u0902 \u0938\u0947 \u0915\u094c\u0928-\u0938\u0940 \u0927\u093e\u0924\u0941 \u0906\u0938\u093e\u0928\u0940 \u0938\u0947 \u091c\u0902\u0917 \u0928\u0939\u0940\u0902 \u0916\u093e\u0924\u0940?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q8\" value=\"a\"> a) \u0924\u093e\u0901\u092c\u093e<\/label>\n <label><input type=\"radio\" name=\"q8\" value=\"b\"> b) \u0932\u094b\u0939\u093e<\/label>\n <label><input type=\"radio\" name=\"q8\" value=\"c\"> c) \u090f\u0932\u094d\u092f\u0941\u092e\u093f\u0928\u093f\u092f\u092e<\/label>\n <label><input type=\"radio\" name=\"q8\" value=\"d\"> d) \u0938\u094b\u0928\u093e<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q9\">\n <h3>\u092a\u094d\u09309. \u0932\u094b\u0939\u0947 \u092a\u0930 \u091c\u0938\u094d\u0924\u093e \u091a\u0922\u093c\u093e\u0928\u0947 \u0915\u0940 \u092a\u094d\u0930\u0915\u094d\u0930\u093f\u092f\u093e \u0915\u094b \u0915\u094d\u092f\u093e \u0915\u0939\u0924\u0947 \u0939\u0948\u0902?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q9\" value=\"a\"> a) \u092e\u093f\u0936\u094d\u0930\u0927\u093e\u0924\u0941 \u092c\u0928\u093e\u0928\u093e<\/label>\n <label><input type=\"radio\" name=\"q9\" value=\"b\"> b) \u0917\u0948\u0932\u094d\u0935\u0928\u093e\u0907\u091c\u093f\u0902\u0917<\/label>\n <label><input type=\"radio\" name=\"q9\" value=\"c\"> c) \u090f\u0928\u094b\u0921\u093e\u0907\u091c\u093f\u0902\u0917<\/label>\n <label><input type=\"radio\" name=\"q9\" value=\"d\"> d) \u0915\u094d\u0930\u094b\u092e \u091a\u0922\u093c\u093e\u0928\u093e<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q10\">\n <h3>\u092a\u094d\u093010. \u0924\u093e\u0930\u094b\u0902 \u0915\u094b \u091c\u094b\u0921\u093c\u0928\u0947 (soldering) \u092e\u0947\u0902 \u0915\u093f\u0938 \u092e\u093f\u0936\u094d\u0930\u0927\u093e\u0924\u0941 \u0915\u093e \u092a\u094d\u0930\u092f\u094b\u0917 \u0939\u094b\u0924\u093e \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q10\" value=\"a\"> a) \u092a\u0940\u0924\u0932<\/label>\n <label><input type=\"radio\" name=\"q10\" value=\"b\"> b) \u0915\u093e\u0901\u0938\u093e<\/label>\n <label><input type=\"radio\" name=\"q10\" value=\"c\"> c) \u0938\u094b\u0932\u094d\u0921\u0930 (\u0938\u0940\u0938\u093e + \u091f\u093f\u0928)<\/label>\n <label><input type=\"radio\" name=\"q10\" value=\"d\"> d) \u0907\u0938\u094d\u092a\u093e\u0924<\/label>\n <\/div>\n <\/div>\n\n \n <div class=\"question\" id=\"div-q11\">\n <h3>\u092a\u094d\u093011. \u0915\u094c\u0928-\u0938\u093e \u0911\u0915\u094d\u0938\u093e\u0907\u0921 \u0909\u092d\u092f\u0927\u0930\u094d\u092e\u0940 (Amphoteric) \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q11\" value=\"a\"> a) ZnO<\/label>\n <label><input type=\"radio\" name=\"q11\" value=\"b\"> b) CaO<\/label>\n <label><input type=\"radio\" name=\"q11\" value=\"c\"> c) Na\u2082O<\/label>\n <label><input type=\"radio\" name=\"q11\" value=\"d\"> d) CO\u2082<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q12\">\n <h3>\u092a\u094d\u093012. \u0927\u093e\u0924\u0941\u0913\u0902 \u0915\u093e \u0938\u093e\u092e\u093e\u0928\u094d\u092f \u0907\u0932\u0947\u0915\u094d\u091f\u094d\u0930\u0949\u0928\u093f\u0915 \u0935\u093f\u0928\u094d\u092f\u093e\u0938 \u0939\u094b\u0924\u093e \u0939\u0948:<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q12\" value=\"a\"> a) \u092c\u093e\u0939\u0930\u0940 \u0915\u0915\u094d\u0937 \u092e\u0947\u0902 1\u20133 \u0907\u0932\u0947\u0915\u094d\u091f\u094d\u0930\u0949\u0928<\/label>\n <label><input type=\"radio\" name=\"q12\" value=\"b\"> b) \u092c\u093e\u0939\u0930\u0940 \u0915\u0915\u094d\u0937 \u092e\u0947\u0902 5\u20137 \u0907\u0932\u0947\u0915\u094d\u091f\u094d\u0930\u0949\u0928<\/label>\n <label><input type=\"radio\" name=\"q12\" value=\"c\"> c) \u092c\u093e\u0939\u0930\u0940 \u0915\u0915\u094d\u0937 \u092e\u0947\u0902 8 \u0907\u0932\u0947\u0915\u094d\u091f\u094d\u0930\u0949\u0928<\/label>\n <label><input type=\"radio\" name=\"q12\" value=\"d\"> d) \u092c\u093e\u0939\u0930\u0940 \u0915\u0915\u094d\u0937 \u092e\u0947\u0902 4 \u0907\u0932\u0947\u0915\u094d\u091f\u094d\u0930\u0949\u0928<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q13\">\n <h3>\u092a\u094d\u093013. \u0928\u093f\u092e\u094d\u0928\u0932\u093f\u0916\u093f\u0924 \u092e\u0947\u0902 \u0938\u0947 \u0915\u094c\u0928-\u0938\u0940 \u0905\u092d\u093f\u0915\u094d\u0930\u093f\u092f\u093e \u0935\u093f\u0938\u094d\u0925\u093e\u092a\u0928 \u0905\u092d\u093f\u0915\u094d\u0930\u093f\u092f\u093e \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q13\" value=\"a\"> a) Cu + 2AgNO\u2083 \u2192 Cu(NO\u2083)\u2082 + 2Ag<\/label>\n <label><input type=\"radio\" name=\"q13\" value=\"b\"> b) 2Mg + O\u2082 \u2192 2MgO<\/label>\n <label><input type=\"radio\" name=\"q13\" value=\"c\"> c) CaCO\u2083 \u2192 CaO + CO\u2082<\/label>\n <label><input type=\"radio\" name=\"q13\" value=\"d\"> d) NaCl \u2192 Na + Cl\u2082<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q14\">\n <h3>\u092a\u094d\u093014. \u091c\u092c \u091c\u0938\u094d\u0924\u093e (Zn) \u0915\u094b \u092a\u0924\u0932\u0947 \u0939\u093e\u0907\u0921\u094d\u0930\u094b\u0915\u094d\u0932\u094b\u0930\u093f\u0915 \u0905\u092e\u094d\u0932 \u0938\u0947 \u0905\u092d\u093f\u0915\u094d\u0930\u093f\u092f\u093f\u0924 \u0915\u093f\u092f\u093e \u091c\u093e\u0924\u093e \u0939\u0948, \u0924\u094b \u0915\u094c\u0928-\u0938\u0940 \u0917\u0948\u0938 \u092c\u0928\u0924\u0940 \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q14\" value=\"a\"> a) \u0911\u0915\u094d\u0938\u0940\u091c\u0928<\/label>\n <label><input type=\"radio\" name=\"q14\" value=\"b\"> b) \u0928\u093e\u0907\u091f\u094d\u0930\u094b\u091c\u0928<\/label>\n <label><input type=\"radio\" name=\"q14\" value=\"c\"> c) \u0939\u093e\u0907\u0921\u094d\u0930\u094b\u091c\u0928<\/label>\n <label><input type=\"radio\" name=\"q14\" value=\"d\"> d) \u0915\u093e\u0930\u094d\u092c\u0928 \u0921\u093e\u0907\u0911\u0915\u094d\u0938\u093e\u0907\u0921<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q15\">\n <h3>\u092a\u094d\u093015. \u0907\u0928\u092e\u0947\u0902 \u0938\u0947 \u0915\u094c\u0928-\u0938\u093e \u092e\u093f\u0936\u094d\u0930\u0927\u093e\u0924\u0941 \u0928\u0939\u0940\u0902 \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q15\" value=\"a\"> a) \u092a\u0940\u0924\u0932<\/label>\n <label><input type=\"radio\" name=\"q15\" value=\"b\"> b) \u0915\u093e\u0901\u0938\u093e<\/label>\n <label><input type=\"radio\" name=\"q15\" value=\"c\"> c) \u0938\u094b\u0932\u094d\u0921\u0930<\/label>\n <label><input type=\"radio\" name=\"q15\" value=\"d\"> d) \u0915\u094d\u0935\u093e\u0930\u094d\u091f\u094d\u091c\u093c<\/label>\n <\/div>\n <\/div>\n\n \n <div class=\"question\" id=\"div-q16\">\n <h3>\u092a\u094d\u093016. \u0915\u094c\u0928-\u0938\u0940 \u0927\u093e\u0924\u0941 \u0920\u0902\u0921\u0947 \u092a\u093e\u0928\u0940 \u0938\u0947 \u0924\u0940\u0935\u094d\u0930\u0924\u093e \u0938\u0947 \u0905\u092d\u093f\u0915\u094d\u0930\u093f\u092f\u093e \u0915\u0930\u0924\u0940 \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q16\" value=\"a\"> a) \u092e\u0948\u0917\u094d\u0928\u0940\u0936\u093f\u092f\u092e<\/label>\n <label><input type=\"radio\" name=\"q16\" value=\"b\"> b) \u0915\u0948\u0932\u094d\u0936\u093f\u092f\u092e<\/label>\n <label><input type=\"radio\" name=\"q16\" value=\"c\"> c) \u0938\u094b\u0921\u093f\u092f\u092e<\/label>\n <label><input type=\"radio\" name=\"q16\" value=\"d\"> d) \u090f\u0932\u094d\u092f\u0941\u092e\u093f\u0928\u093f\u092f\u092e<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q17\">\n <h3>\u092a\u094d\u093017. \u091c\u0938\u094d\u0924\u093e (Zn) \u0915\u0940 \u092d\u093e\u092a (steam) \u0915\u0947 \u0938\u093e\u0925 \u0905\u092d\u093f\u0915\u094d\u0930\u093f\u092f\u093e \u0938\u0947 \u0915\u094d\u092f\u093e \u092c\u0928\u0924\u093e \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q17\" value=\"a\"> a) ZnO + H\u2082<\/label>\n <label><input type=\"radio\" name=\"q17\" value=\"b\"> b) Zn(OH)\u2082<\/label>\n <label><input type=\"radio\" name=\"q17\" value=\"c\"> c) ZnCl\u2082 + H\u2082<\/label>\n <label><input type=\"radio\" name=\"q17\" value=\"d\"> d) Zn + H\u2082O\u2082<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q18\">\n <h3>\u092a\u094d\u093018. \u0924\u093e\u0901\u092c\u0947 \u0915\u0940 \u0935\u0938\u094d\u0924\u0941\u0913\u0902 \u092a\u0930 \u0939\u0930\u0940 \u092a\u0930\u0924 \u0915\u093f\u0938 \u0915\u093e\u0930\u0923 \u0938\u0947 \u092c\u0928\u0924\u0940 \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q18\" value=\"a\"> a) \u0915\u0949\u092a\u0930 \u0911\u0915\u094d\u0938\u093e\u0907\u0921<\/label>\n <label><input type=\"radio\" name=\"q18\" value=\"b\"> b) \u0915\u0949\u092a\u0930 \u0938\u0932\u094d\u092b\u093c\u093e\u0907\u0921<\/label>\n <label><input type=\"radio\" name=\"q18\" value=\"c\"> c) \u0915\u0949\u092a\u0930 \u0915\u093e\u0930\u094d\u092c\u094b\u0928\u0947\u091f<\/label>\n <label><input type=\"radio\" name=\"q18\" value=\"d\"> d) \u0915\u0949\u092a\u0930 \u0928\u093e\u0907\u091f\u094d\u0930\u0947\u091f<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q19\">\n <h3>\u092a\u094d\u093019. \u0935\u093f\u0926\u094d\u092f\u0941\u0924 \u0905\u092a\u091a\u092f\u0928 (Electrolytic reduction) \u0915\u093e \u0909\u092a\u092f\u094b\u0917 \u0915\u093f\u0938 \u0927\u093e\u0924\u0941 \u0915\u094b \u0928\u093f\u0915\u093e\u0932\u0928\u0947 \u092e\u0947\u0902 \u0939\u094b\u0924\u093e \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q19\" value=\"a\"> a) \u0932\u094b\u0939\u093e<\/label>\n <label><input type=\"radio\" name=\"q19\" value=\"b\"> b) \u091c\u0938\u094d\u0924\u093e<\/label>\n <label><input type=\"radio\" name=\"q19\" value=\"c\"> c) \u090f\u0932\u094d\u092f\u0941\u092e\u093f\u0928\u093f\u092f\u092e<\/label>\n <label><input type=\"radio\" name=\"q19\" value=\"d\"> d) \u0924\u093e\u0901\u092c\u093e<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q20\">\n <h3>\u092a\u094d\u093020. \u0938\u093f\u0928\u093e\u092c\u093e\u0930 \u0905\u092f\u0938\u094d\u0915 (Cinnabar ore) \u0938\u0947 \u0915\u094c\u0928-\u0938\u0940 \u0927\u093e\u0924\u0941 \u092a\u094d\u0930\u093e\u092a\u094d\u0924 \u0939\u094b\u0924\u0940 \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q20\" value=\"a\"> a) \u091a\u093e\u0901\u0926\u0940<\/label>\n <label><input type=\"radio\" name=\"q20\" value=\"b\"> b) \u0924\u093e\u0901\u092c\u093e<\/label>\n <label><input type=\"radio\" name=\"q20\" value=\"c\"> c) \u092a\u093e\u0930\u093e<\/label>\n <label><input type=\"radio\" name=\"q20\" value=\"d\"> d) \u090f\u0932\u094d\u092f\u0941\u092e\u093f\u0928\u093f\u092f\u092e<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q21\">\n <h3>\u092a\u094d\u093021. \u0935\u093f\u0926\u094d\u092f\u0941\u0924 \u0936\u094b\u0927\u0928 (Electrolytic refining) \u092e\u0947\u0902 \u0936\u0941\u0926\u094d\u0927 \u0927\u093e\u0924\u0941 \u0915\u093f\u0938 \u0907\u0932\u0947\u0915\u094d\u091f\u094d\u0930\u094b\u0921 \u092a\u0930 \u091c\u092e\u093e \u0939\u094b\u0924\u0940 \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q21\" value=\"a\"> a) \u0910\u0928\u094b\u0921 (Anode)<\/label>\n <label><input type=\"radio\" name=\"q21\" value=\"b\"> b) \u0915\u0948\u0925\u094b\u0921 (Cathode)<\/label>\n <label><input type=\"radio\" name=\"q21\" value=\"c\"> c) \u0926\u094b\u0928\u094b\u0902<\/label>\n <label><input type=\"radio\" name=\"q21\" value=\"d\"> d) \u0907\u0932\u0947\u0915\u094d\u091f\u094d\u0930\u094b\u0932\u093e\u0907\u091f<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q22\">\n <h3>\u092a\u094d\u093022. \u0917\u093c\u0932\u0924 \u092f\u0941\u0917\u094d\u092e (pair) \u092a\u0939\u091a\u093e\u0928\u093f\u090f:<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q22\" value=\"a\"> a) \u092a\u0940\u0924\u0932 \u2013 \u0924\u093e\u0901\u092c\u093e + \u091c\u0938\u094d\u0924\u093e<\/label>\n <label><input type=\"radio\" name=\"q22\" value=\"b\"> b) \u0915\u093e\u0901\u0938\u093e \u2013 \u0924\u093e\u0901\u092c\u093e + \u091f\u093f\u0928<\/label>\n <label><input type=\"radio\" name=\"q22\" value=\"c\"> c) \u0938\u094d\u091f\u0947\u0928\u0932\u0947\u0938 \u0938\u094d\u091f\u0940\u0932 \u2013 \u0932\u094b\u0939\u093e + \u0928\u093f\u0915\u0947\u0932 + \u0915\u094d\u0930\u094b\u092e\u093f\u092f\u092e<\/label>\n <label><input type=\"radio\" name=\"q22\" value=\"d\"> d) \u0905\u092e\u0932\u0917\u092e \u2013 \u0924\u093e\u0901\u092c\u093e + \u090f\u0932\u094d\u092f\u0941\u092e\u093f\u0928\u093f\u092f\u092e<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q23\">\n <h3>\u092a\u094d\u093023. \u0925\u0930\u094d\u092e\u093e\u0907\u091f \u0935\u0947\u0932\u094d\u0921\u093f\u0902\u0917 (Thermite welding) \u092e\u0947\u0902 \u0915\u093f\u0938\u0915\u093e \u0909\u092a\u092f\u094b\u0917 \u0939\u094b\u0924\u093e \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q23\" value=\"a\"> a) Al + ZnO<\/label>\n <label><input type=\"radio\" name=\"q23\" value=\"b\"> b) Al + Fe\u2082O\u2083<\/label>\n <label><input type=\"radio\" name=\"q23\" value=\"c\"> c) Mg + CuO<\/label>\n <label><input type=\"radio\" name=\"q23\" value=\"d\"> d) Zn + CuSO\u2084<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q24\">\n <h3>\u092a\u094d\u093024. \u0907\u0928\u092e\u0947\u0902 \u0938\u0947 \u0938\u092c\u0938\u0947 \u0905\u0927\u093f\u0915 \u0905\u092d\u093f\u0915\u094d\u0930\u093f\u092f\u093e\u0936\u0940\u0932 \u0927\u093e\u0924\u0941 \u0915\u094c\u0928-\u0938\u0940 \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q24\" value=\"a\"> a) \u0924\u093e\u0901\u092c\u093e<\/label>\n <label><input type=\"radio\" name=\"q24\" value=\"b\"> b) \u091a\u093e\u0901\u0926\u0940<\/label>\n <label><input type=\"radio\" name=\"q24\" value=\"c\"> c) \u092a\u094b\u091f\u0948\u0936\u093f\u092f\u092e<\/label>\n <label><input type=\"radio\" name=\"q24\" value=\"d\"> d) \u0932\u094b\u0939\u093e<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q25\">\n <h3>\u092a\u094d\u093025. \u0906\u092f\u0928\u093f\u0915 \u092f\u094c\u0917\u093f\u0915 \u0935\u093f\u0926\u094d\u092f\u0941\u0924 \u0915\u093e \u0938\u0902\u091a\u093e\u0932\u0928 \u0915\u0930\u0924\u0947 \u0939\u0948\u0902:<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q25\" value=\"a\"> a) \u0915\u0947\u0935\u0932 \u0920\u094b\u0938 \u0905\u0935\u0938\u094d\u0925\u093e \u092e\u0947\u0902<\/label>\n <label><input type=\"radio\" name=\"q25\" value=\"b\"> b) \u0926\u094d\u0930\u0935 \u0905\u0935\u0938\u094d\u0925\u093e \u0914\u0930 \u091c\u0932\u0940\u092f \u0935\u093f\u0932\u092f\u0928 \u092e\u0947\u0902<\/label>\n <label><input type=\"radio\" name=\"q25\" value=\"c\"> c) \u0926\u094b\u0928\u094b\u0902 \u0920\u094b\u0938 \u0914\u0930 \u0926\u094d\u0930\u0935 \u0905\u0935\u0938\u094d\u0925\u093e \u092e\u0947\u0902<\/label>\n <label><input type=\"radio\" name=\"q25\" value=\"d\"> d) \u0915\u0947\u0935\u0932 \u0920\u094b\u0938 \u0905\u0935\u0938\u094d\u0925\u093e \u092e\u0947\u0902<\/label>\n <\/div>\n <\/div>\n\n <\/form>\n\n <div class=\"controls\">\n <button id=\"checkBtn\" onclick=\"checkAnswers()\">\u0909\u0924\u094d\u0924\u0930 \u091c\u093e\u0901\u091a\u0947\u0902 (Check Answers)<\/button>\n <button id=\"clearBtn\" onclick=\"clearScoreboard()\">\u0938\u094d\u0915\u094b\u0930\u092c\u094b\u0930\u094d\u0921 \u0938\u093e\u092b\u093c \u0915\u0930\u0947\u0902<\/button>\n <\/div>\n\n <div id=\"result\" class=\"muted\"><\/div>\n\n <div id=\"scoreboard\">\n <h3>\ud83c\udfc6 \u0938\u094d\u0915\u094b\u0930\u092c\u094b\u0930\u094d\u0921<\/h3>\n <div class=\"muted\">(\u0938\u094d\u0925\u093e\u092f\u0940 \u2014 \u092a\u0939\u0932\u0947 \u0915\u0947 \u0930\u093f\u0915\u0949\u0930\u094d\u0921\u094d\u0938 \u092d\u0940 \u0938\u0902\u091a\u093f\u0924 \u0930\u0939\u0924\u0947 \u0939\u0948\u0902)<\/div>\n <table>\n <thead>\n <tr><th>\u0928\u093e\u092e<\/th><th>\u0938\u094d\u0915\u094b\u0930<\/th><th>\u0926\u093f\u0928\u093e\u0902\u0915 \/ \u0938\u092e\u092f<\/th><\/tr>\n <\/thead>\n <tbody id=\"scoreTableBody\"><\/tbody>\n <\/table>\n <\/div>\n <\/div>\n\n <script>\n const answers = {\n q1: \"a\", q2: \"b\", q3: \"c\", q4: \"b\", q5: \"b\",\n q6: \"b\", q7: \"b\", q8: \"d\", q9: \"b\", q10: \"c\",\n q11: \"a\", q12: \"a\", q13: \"a\", q14: \"c\", q15: \"d\",\n q16: \"c\", q17: \"a\", q18: \"c\", q19: \"c\", q20: \"c\",\n q21: \"b\", q22: \"d\", q23: \"b\", q24: \"c\", q25: \"b\"\n };\n\n \/\/ load scoreboard from localStorage or initialize\n function loadScoreboard() {\n const stored = localStorage.getItem(\"metals_scoreboard_v1\");\n if (stored) return JSON.parse(stored);\n return [];\n }\n\n function saveScoreboard(board) {\n localStorage.setItem(\"metals_scoreboard_v1\", JSON.stringify(board));\n }\n\n function renderScoreboard() {\n const board = loadScoreboard();\n const tbody = document.getElementById(\"scoreTableBody\");\n tbody.innerHTML = \"\";\n board.forEach(entry => {\n const tr = document.createElement(\"tr\");\n const nameTd = document.createElement(\"td\");\n nameTd.textContent = entry.name;\n const scoreTd = document.createElement(\"td\");\n scoreTd.textContent = entry.score + \"\/25\";\n const timeTd = document.createElement(\"td\");\n timeTd.textContent = new Date(entry.time).toLocaleString('hi-IN');\n tr.appendChild(nameTd);\n tr.appendChild(scoreTd);\n tr.appendChild(timeTd);\n tbody.appendChild(tr);\n });\n }\n\n function checkAnswers() {\n \/\/ remove previous highlights and correct-answer notes\n document.querySelectorAll('.question').forEach(qDiv => {\n qDiv.classList.remove('correct','incorrect');\n const oldNote = qDiv.querySelector('.correct-answer');\n if (oldNote) oldNote.remove();\n });\n\n const form = document.getElementById(\"quizForm\");\n let score = 0;\n for (let q in answers) {\n \/\/ find the question container\n const firstInput = form.querySelector(`[name=\"${q}\"]`);\n if (!firstInput) continue;\n const qDiv = firstInput.closest('.question');\n const selected = form.querySelector(`input[name=\"${q}\"]:checked`);\n if (selected && selected.value === answers[q]) {\n qDiv.classList.add('correct');\n score++;\n } else {\n qDiv.classList.add('incorrect');\n \/\/ show the correct option text\n \/\/ find label text for the correct option\n const correctVal = answers[q];\n \/\/ find the label whose input has that value\n const correctInput = qDiv.querySelector(`input[name=\"${q}\"][value=\"${correctVal}\"]`);\n if (correctInput) {\n \/\/ get the label element (parent)\n const label = correctInput.closest('label');\n let correctText = \"\";\n if (label) {\n correctText = label.textContent.trim();\n } else {\n \/\/ fallback - build from option letter\n correctText = \"\u0938\u0939\u0940 \u0909\u0924\u094d\u0924\u0930: \" + correctVal;\n }\n const note = document.createElement('span');\n note.className = 'correct-answer';\n note.textContent = `\u0938\u0939\u0940 \u0909\u0924\u094d\u0924\u0930: ${correctText.replace(\/^[a-d]\\)\\s*\/i, '')}`.replace(\/\\s{2,}\/g,' ');\n qDiv.appendChild(note);\n }\n }\n }\n\n const username = (document.getElementById(\"username\").value || \"\u0915\u094b\u0908 \u0928\u093e\u092e\") .trim();\n document.getElementById(\"result\").textContent = `${username}, \u0906\u092a\u0915\u093e \u0938\u094d\u0915\u094b\u0930 \u0939\u0948: ${score}\/25`;\n\n \/\/ update scoreboard in localStorage (keep previous entries)\n const board = loadScoreboard();\n board.push({ name: username, score: score, time: new Date().toISOString() });\n \/\/ sort by score desc, then by time asc (earlier first) or latest first - choose latest first if scores equal\n board.sort((a,b) => {\n if (b.score !== a.score) return b.score - a.score;\n return new Date(b.time) - new Date(a.time);\n });\n \/\/ keep only e.g. top 100 entries to avoid huge storage (optional)\n const topBoard = board.slice(0, 200);\n saveScoreboard(topBoard);\n renderScoreboard();\n\n \/\/ scroll to result\n document.getElementById(\"result\").scrollIntoView({behavior:'smooth'});\n }\n\n function clearScoreboard() {\n if (!confirm(\"\u0915\u094d\u092f\u093e \u0906\u092a \u0935\u093e\u0915\u0908 \u0938\u094d\u0915\u094b\u0930\u092c\u094b\u0930\u094d\u0921 \u0938\u093e\u092b\u093c \u0915\u0930\u0928\u093e \u091a\u093e\u0939\u0924\u0947 \u0939\u0948\u0902? (LocalStorage \u092e\u0947\u0902 \u0938\u0947 \u0939\u091f\u0947\u0917\u093e)\")) return;\n localStorage.removeItem(\"metals_scoreboard_v1\");\n renderScoreboard();\n }\n\n \/\/ initial render\n renderScoreboard();\n <\/script>\n<\/body>\n<\/html>\n\n","protected":false},"excerpt":{"rendered":"<p>class 10 chapter 3 science test Advanced Age Calculator \ud83d\udd52 […]<\/p>\n","protected":false},"author":1,"featured_media":19,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5181","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/posts\/5181","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/comments?post=5181"}],"version-history":[{"count":2,"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/posts\/5181\/revisions"}],"predecessor-version":[{"id":5184,"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/posts\/5181\/revisions\/5184"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/media\/19"}],"wp:attachment":[{"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/media?parent=5181"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/categories?post=5181"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/tags?post=5181"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":5181,"date":"2025-09-12T20:25:05","date_gmt":"2025-09-12T14:55:05","guid":{"rendered":"https:\/\/apicalclasses.com\/?p=5181"},"modified":"2025-09-12T20:32:44","modified_gmt":"2025-09-12T15:02:44","slug":"class-10-chapter-3-science-test","status":"publish","type":"post","link":"https:\/\/apicalclasses.com\/class-10-chapter-3-science-test\/","title":{"rendered":"class 10 chapter 3 science test"},"content":{"rendered":"\n

class 10 chapter 3 science test <\/p>\n\n\n\n\n\n\n \n Advanced Age Calculator<\/title>\n <style>\n body {\n font-family: Arial, sans-serif;\n background-color: #f0f8ff;\n color: #333;\n padding: 30px;\n }\n .container {\n background-color: white;\n padding: 25px;\n border-radius: 10px;\n box-shadow: 0 0 15px rgba(0, 0, 0, 0.15);\n max-width: 500px;\n margin: auto;\n }\n h2 {\n color: #2e8b57;\n }\n label {\n font-weight: bold;\n }\n input[type=\"date\"] {\n padding: 8px;\n margin: 10px 0;\n width: 220px;\n font-size: 16px;\n }\n button {\n padding: 10px 20px;\n background-color: #2e8b57;\n color: white;\n border: none;\n cursor: pointer;\n font-weight: bold;\n font-size: 16px;\n }\n button:hover {\n background-color: #1e6843;\n }\n #result {\n margin-top: 20px;\n font-size: 18px;\n color: #006699;\n font-weight: bold;\n }\n <\/style>\n<\/head>\n<body>\n <div class=\"container\">\n <h2>\ud83d\udd52 Advanced Age Calculator<\/h2>\n <label for=\"dob\">Select Your Date of Birth:<\/label><br>\n <input type=\"date\" id=\"dob\"><br><br>\n <button onclick=\"calculateAge()\">Calculate Full Age<\/button>\n <div id=\"result\"><\/div>\n <\/div>\n\n <script>\n function calculateAge() {\n const dobInput = document.getElementById(\"dob\").value;\n if (!dobInput) {\n document.getElementById(\"result\").innerHTML = \"\u2757 Please select your date of birth.\";\n return;\n }\n\n const dob = new Date(dobInput);\n const now = new Date();\n\n if (dob > now) {\n document.getElementById(\"result\").innerHTML = \"\u2757 Date of birth cannot be in the future.\";\n return;\n }\n\n const diffMs = now - dob;\n const totalDays = Math.floor(diffMs \/ (1000 * 60 * 60 * 24)); \/\/ Total days\n\n let years = now.getFullYear() - dob.getFullYear();\n let months = now.getMonth() - dob.getMonth();\n let days = now.getDate() - dob.getDate();\n let hours = now.getHours() - dob.getHours();\n let minutes = now.getMinutes() - dob.getMinutes();\n let seconds = now.getSeconds() - dob.getSeconds();\n\n if (seconds < 0) {\n seconds += 60;\n minutes--;\n }\n\n if (minutes < 0) {\n minutes += 60;\n hours--;\n }\n\n if (hours < 0) {\n hours += 24;\n days--;\n }\n\n if (days < 0) {\n months--;\n const prevMonth = new Date(now.getFullYear(), now.getMonth(), 0).getDate();\n days += prevMonth;\n }\n\n if (months < 0) {\n months += 12;\n years--;\n }\n\n document.getElementById(\"result\").innerHTML =\n `\ud83c\udf82 You are <strong>${years}<\/strong> years, <strong>${months}<\/strong> months, <strong>${days}<\/strong> days,<br>\n <strong>${hours}<\/strong> hours, <strong>${minutes}<\/strong> minutes, <strong>${seconds}<\/strong> seconds old.<br><br>\n \ud83d\udcc6 <strong>Total Days:<\/strong> ${totalDays} days`;\n }\n <\/script>\n<\/body>\n<\/html>\n\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center has-tan-color has-blue-background-color has-text-color has-background has-link-color wp-elements-b3f51a848f5c327873f445be1e7d27d9\"><strong>ENGLISH<\/strong><\/h2>\n\n\n\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n <meta charset=\"UTF-8\">\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n <title>Metals & Non-Metals Quiz<\/title>\n <style>\n body {\n font-family: Arial, sans-serif;\n background: linear-gradient(135deg, #74ebd5, #9face6);\n margin: 0;\n padding: 20px;\n text-align: center;\n }\n .quiz-container {\n background: #fff;\n border-radius: 15px;\n padding: 20px;\n max-width: 700px;\n margin: auto;\n box-shadow: 0 4px 8px rgba(0,0,0,0.2);\n }\n .hidden { display: none; }\n .question { font-size: 18px; margin-bottom: 15px; }\n .options label {\n display: block;\n text-align: left;\n padding: 10px;\n border-radius: 8px;\n margin: 5px 0;\n cursor: pointer;\n border: 1px solid #ccc;\n }\n .options input { margin-right: 10px; }\n button {\n padding: 10px 20px;\n margin: 10px;\n border: none;\n border-radius: 8px;\n cursor: pointer;\n background: #1e88e5;\n color: white;\n font-size: 16px;\n }\n button:hover { background: #1565c0; }\n #scoreboard {\n margin-top: 20px;\n text-align: left;\n }\n #scoreboard h3 { margin-bottom: 10px; }\n table {\n width: 100%;\n border-collapse: collapse;\n }\n th, td {\n padding: 8px;\n border-bottom: 1px solid #ccc;\n text-align: center;\n }\n <\/style>\n<\/head>\n<body>\n <div class=\"quiz-container\">\n <h2>\u26a1 Metals & Non-Metals Quiz<\/h2>\n <div id=\"start-screen\">\n <p>Enter your name to begin:<\/p>\n <input type=\"text\" id=\"username\" placeholder=\"Your Name\">\n <br><br>\n <button onclick=\"startQuiz()\">Start Quiz<\/button>\n <\/div>\n\n <div id=\"quiz-screen\" class=\"hidden\">\n <p id=\"question-number\"><\/p>\n <div id=\"question\" class=\"question\"><\/div>\n <div id=\"options\" class=\"options\"><\/div>\n <button onclick=\"prevQuestion()\">Previous<\/button>\n <button onclick=\"nextQuestion()\">Next<\/button>\n <br>\n <button onclick=\"submitQuiz()\">Submit Quiz<\/button>\n <\/div>\n\n <div id=\"result-screen\" class=\"hidden\">\n <h3 id=\"result\"><\/h3>\n <button onclick=\"restartQuiz()\">Try Again<\/button>\n <\/div>\n\n <div id=\"scoreboard\">\n <h3>\ud83c\udfc6 Scoreboard<\/h3>\n <table>\n <thead>\n <tr><th>Name<\/th><th>Score<\/th><\/tr>\n <\/thead>\n <tbody id=\"scoreboard-body\"><\/tbody>\n <\/table>\n <\/div>\n <\/div>\n\n <script>\n const questions = [\n \/\/ ---------------- EASY (10) ----------------\n { q: \"Metals are generally:\", options: [\"Good conductors of heat and electricity\",\"Poor conductors of heat\",\"Brittle\",\"Liquid at room temperature\"], answer: 0 },\n { q: \"Which of the following is a non-metal but lustrous?\", options: [\"Phosphorus\",\"Iodine\",\"Sulphur\",\"Carbon (coal)\"], answer: 1 },\n { q: \"The most ductile metal is:\", options: [\"Copper\",\"Silver\",\"Gold\",\"Aluminium\"], answer: 2 },\n { q: \"Which non-metal exists in liquid state?\", options: [\"Chlorine\",\"Bromine\",\"Iodine\",\"Oxygen\"], answer: 1 },\n { q: \"Metals generally form which type of oxides?\", options: [\"Acidic\",\"Basic\",\"Neutral\",\"All of the above\"], answer: 1 },\n { q: \"When metals react with acids, they release:\", options: [\"Oxygen\",\"Hydrogen\",\"Nitrogen\",\"Carbon dioxide\"], answer: 1 },\n { q: \"Silver reacts with sulphur in the air to form:\", options: [\"Silver chloride\",\"Silver sulphide\",\"Silver oxide\",\"Silver carbonate\"], answer: 1 },\n { q: \"Which metal does not corrode easily?\", options: [\"Copper\",\"Iron\",\"Aluminium\",\"Gold\"], answer: 3 },\n { q: \"The process of coating iron with zinc is called:\", options: [\"Alloying\",\"Galvanising\",\"Anodising\",\"Chrome plating\"], answer: 1 },\n { q: \"Which alloy is used for soldering wires?\", options: [\"Brass\",\"Bronze\",\"Solder (Lead + Tin)\",\"Steel\"], answer: 2 },\n\n \/\/ ---------------- MEDIUM (5) ----------------\n { q: \"Which oxide is amphoteric?\", options: [\"ZnO\",\"CaO\",\"Na\u2082O\",\"CO\u2082\"], answer: 0 },\n { q: \"The general electronic configuration of metals is:\", options: [\"1\u20133 electrons in outermost shell\",\"5\u20137 electrons in outermost shell\",\"8 electrons in outermost shell\",\"4 electrons in outermost shell\"], answer: 0 },\n { q: \"Which of the following reactions is a displacement reaction?\", options: [\"Cu + 2AgNO\u2083 \u2192 Cu(NO\u2083)\u2082 + 2Ag\",\"2Mg + O\u2082 \u2192 2MgO\",\"CaCO\u2083 \u2192 CaO + CO\u2082\",\"NaCl \u2192 Na + Cl\u2082\"], answer: 0 },\n { q: \"Which gas is formed when zinc reacts with dilute hydrochloric acid?\", options: [\"Oxygen\",\"Nitrogen\",\"Hydrogen\",\"Carbon dioxide\"], answer: 2 },\n { q: \"Which of the following is not an alloy?\", options: [\"Brass\",\"Bronze\",\"Solder\",\"Quartz\"], answer: 3 },\n\n \/\/ ---------------- TOUGH (10) ----------------\n { q: \"Which metal reacts vigorously with cold water?\", options: [\"Magnesium\",\"Calcium\",\"Sodium\",\"Aluminium\"], answer: 2 },\n { q: \"The reaction of Zn with steam forms:\", options: [\"ZnO + H\u2082\",\"Zn(OH)\u2082\",\"ZnCl\u2082 + H\u2082\",\"Zn + H\u2082O\u2082\"], answer: 0 },\n { q: \"The green coating on copper articles is due to:\", options: [\"Copper oxide\",\"Copper sulphide\",\"Copper carbonate\",\"Copper nitrate\"], answer: 2 },\n { q: \"Electrolytic reduction is used for extracting:\", options: [\"Iron\",\"Zinc\",\"Aluminium\",\"Copper\"], answer: 2 },\n { q: \"Which one is extracted from cinnabar ore?\", options: [\"Silver\",\"Copper\",\"Mercury\",\"Aluminium\"], answer: 2 },\n { q: \"The pure metal is deposited on which electrode during electrolytic refining?\", options: [\"Anode\",\"Cathode\",\"Both\",\"Electrolyte\"], answer: 1 },\n { q: \"Identify the incorrect pair:\", options: [\"Brass \u2013 Copper + Zinc\",\"Bronze \u2013 Copper + Tin\",\"Stainless steel \u2013 Iron + Nickel + Chromium\",\"Amalgam \u2013 Copper + Aluminium\"], answer: 3 },\n { q: \"Which of the following is used in thermite welding?\", options: [\"Al + ZnO\",\"Al + Fe\u2082O\u2083\",\"Mg + CuO\",\"Zn + CuSO\u2084\"], answer: 1 },\n { q: \"Which is the most reactive metal?\", options: [\"Copper\",\"Silver\",\"Potassium\",\"Iron\"], answer: 2 },\n { q: \"Ionic compounds conduct electricity in:\", options: [\"Solid state only\",\"Molten state and aqueous solution\",\"Both solid and molten state\",\"Only solid state\"], answer: 1 }\n ];\n\n let currentQuestion = 0;\n let userAnswers = [];\n let score = 0;\n let username = \"\";\n\n function startQuiz() {\n username = document.getElementById(\"username\").value.trim();\n if (!username) { alert(\"Please enter your name\"); return; }\n document.getElementById(\"start-screen\").classList.add(\"hidden\");\n document.getElementById(\"quiz-screen\").classList.remove(\"hidden\");\n showQuestion();\n }\n\n function showQuestion() {\n document.getElementById(\"question-number\").innerText =\n `Question ${currentQuestion+1} of ${questions.length}`;\n document.getElementById(\"question\").innerText =\n questions[currentQuestion].q;\n const optionsDiv = document.getElementById(\"options\");\n optionsDiv.innerHTML = \"\";\n questions[currentQuestion].options.forEach((opt, i) => {\n const label = document.createElement(\"label\");\n const input = document.createElement(\"input\");\n input.type = \"radio\";\n input.name = \"option\";\n input.value = i;\n if (userAnswers[currentQuestion] == i) input.checked = true;\n label.appendChild(input);\n label.appendChild(document.createTextNode(opt));\n optionsDiv.appendChild(label);\n });\n }\n\n function nextQuestion() {\n saveAnswer();\n if (currentQuestion < questions.length - 1) {\n currentQuestion++;\n showQuestion();\n }\n }\n\n function prevQuestion() {\n saveAnswer();\n if (currentQuestion > 0) {\n currentQuestion--;\n showQuestion();\n }\n }\n\n function saveAnswer() {\n const selected = document.querySelector('input[name=\"option\"]:checked');\n if (selected) userAnswers[currentQuestion] = parseInt(selected.value);\n }\n\n function submitQuiz() {\n saveAnswer();\n score = 0;\n userAnswers.forEach((ans, i) => {\n if (ans === questions[i].answer) score++;\n });\n document.getElementById(\"quiz-screen\").classList.add(\"hidden\");\n document.getElementById(\"result-screen\").classList.remove(\"hidden\");\n document.getElementById(\"result\").innerText =\n `${username}, your score is ${score}\/${questions.length}`;\n\n updateScoreboard(username, score);\n }\n\n function updateScoreboard(name, score) {\n let scoreboard = JSON.parse(localStorage.getItem(\"scoreboard\")) || [];\n scoreboard.push({ name, score });\n scoreboard.sort((a,b) => b.score - a.score);\n localStorage.setItem(\"scoreboard\", JSON.stringify(scoreboard));\n renderScoreboard();\n }\n\n function renderScoreboard() {\n let scoreboard = JSON.parse(localStorage.getItem(\"scoreboard\")) || [];\n const tbody = document.getElementById(\"scoreboard-body\");\n tbody.innerHTML = \"\";\n scoreboard.forEach(entry => {\n const row = `<tr><td>${entry.name}<\/td><td>${entry.score}<\/td><\/tr>`;\n tbody.innerHTML += row;\n });\n }\n\n function restartQuiz() {\n currentQuestion = 0;\n userAnswers = [];\n score = 0;\n document.getElementById(\"result-screen\").classList.add(\"hidden\");\n document.getElementById(\"quiz-screen\").classList.remove(\"hidden\");\n showQuestion();\n }\n\n window.onload = renderScoreboard;\n <\/script>\n<\/body>\n<\/html>\n\n\n\n\n\n\n\n\n<!DOCTYPE html>\n<html lang=\"hi\">\n<head>\n <meta charset=\"UTF-8\" \/>\n <title>\u0927\u093e\u0924\u0941\u090f\u0901 \u0914\u0930 \u0905\u0927\u093e\u0924\u0941\u090f\u0901 – \u0915\u0915\u094d\u0937\u093e 10 MCQ \u0915\u094d\u0935\u093f\u091c\u093c<\/title>\n <style>\n body {\n font-family: Arial, sans-serif;\n margin: 20px;\n background: linear-gradient(135deg,#f0f7ff,#f7fff2);\n }\n .container {\n max-width: 900px;\n margin: auto;\n background: white;\n padding: 18px 22px;\n border-radius: 10px;\n box-shadow: 0 6px 18px rgba(0,0,0,0.08);\n }\n h1 { text-align: center; color: #0b5; margin-top: 0; }\n label.name { display:block; margin-bottom: 8px; font-weight:600; }\n input[type=\"text\"] {\n width: 60%;\n padding: 8px;\n border-radius: 6px;\n border: 1px solid #ccc;\n margin-bottom: 14px;\n }\n .question {\n border-radius: 8px;\n padding: 12px;\n margin-bottom: 12px;\n background: #fff;\n border: 1px solid #e6e6e6;\n }\n .question h3 {\n margin: 0 0 8px 0;\n font-size: 16px;\n color: #333;\n }\n .options label {\n display:block;\n padding: 8px;\n border-radius: 6px;\n margin: 6px 0;\n cursor: pointer;\n border: 1px solid transparent;\n }\n .options input { margin-right: 8px; }\n .correct { background: #dff7dc !important; border-color:#8dd39c !important; }\n .incorrect { background: #ffdfe0 !important; border-color:#ff9ea8 !important; }\n .correct-answer {\n display:block;\n margin-top: 8px;\n font-size:14px;\n color: #005500;\n font-weight:600;\n }\n .controls {\n text-align:center;\n margin: 14px 0 8px;\n }\n button {\n padding: 10px 16px;\n margin: 6px;\n border-radius: 8px;\n border: none;\n cursor: pointer;\n font-weight: 600;\n }\n button#checkBtn { background:#1976d2; color:white; }\n button#clearBtn { background:#e53935; color:white; }\n #result {\n margin-top: 10px;\n font-size: 18px;\n font-weight:700;\n text-align:center;\n }\n #scoreboard {\n margin-top: 18px;\n background: #fafafa;\n padding: 12px;\n border-radius: 8px;\n border: 1px solid #eee;\n }\n table { width:100%; border-collapse: collapse; margin-top:8px; }\n th, td { padding:8px; border-bottom: 1px solid #eee; text-align:center; }\n th { background:#f2f2f2; }\n .muted { color:#666; font-size:13px; }\n <\/style>\n<\/head>\n<body>\n <div class=\"container\">\n <h1>\u0915\u0915\u094d\u0937\u093e 10 \u2014 \u0927\u093e\u0924\u0941\u090f\u0901 \u0914\u0930 \u0905\u0927\u093e\u0924\u0941\u090f\u0901 (25 MCQs)<\/h1>\n\n <label class=\"name\">\u0905\u092a\u0928\u093e \u0928\u093e\u092e \u0926\u0930\u094d\u091c \u0915\u0930\u0947\u0902:<\/label>\n <input type=\"text\" id=\"username\" placeholder=\"\u0905\u092a\u0928\u093e \u0928\u093e\u092e \u0932\u093f\u0916\u0947\u0902\">\n\n <form id=\"quizForm\">\n \n <div class=\"question\" id=\"div-q1\">\n <h3>\u092a\u094d\u09301. \u0927\u093e\u0924\u0941\u090f\u0901 \u0938\u093e\u092e\u093e\u0928\u094d\u092f\u0924\u0903 \u0939\u094b\u0924\u0940 \u0939\u0948\u0902:<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q1\" value=\"a\"> a) \u090a\u0937\u094d\u092e\u093e \u0914\u0930 \u0935\u093f\u0926\u094d\u092f\u0941\u0924 \u0915\u0940 \u0905\u091a\u094d\u091b\u0940 \u0938\u0941\u091a\u093e\u0932\u0915<\/label>\n <label><input type=\"radio\" name=\"q1\" value=\"b\"> b) \u090a\u0937\u094d\u092e\u093e \u0915\u0940 \u0916\u0930\u093e\u092c \u0938\u0941\u091a\u093e\u0932\u0915<\/label>\n <label><input type=\"radio\" name=\"q1\" value=\"c\"> c) \u092d\u0902\u0917\u0941\u0930<\/label>\n <label><input type=\"radio\" name=\"q1\" value=\"d\"> d) \u0915\u092e\u0930\u0947 \u0915\u0947 \u0924\u093e\u092a\u092e\u093e\u0928 \u092a\u0930 \u0926\u094d\u0930\u0935<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q2\">\n <h3>\u092a\u094d\u09302. \u0928\u093f\u092e\u094d\u0928\u0932\u093f\u0916\u093f\u0924 \u092e\u0947\u0902 \u0938\u0947 \u0915\u094c\u0928-\u0938\u093e \u0905\u0927\u093e\u0924\u0941 \u091a\u092e\u0915\u0940\u0932\u093e \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q2\" value=\"a\"> a) \u092b\u0949\u0938\u094d\u092b\u094b\u0930\u0938<\/label>\n <label><input type=\"radio\" name=\"q2\" value=\"b\"> b) \u0906\u092f\u094b\u0921\u0940\u0928<\/label>\n <label><input type=\"radio\" name=\"q2\" value=\"c\"> c) \u0917\u0902\u0927\u0915<\/label>\n <label><input type=\"radio\" name=\"q2\" value=\"d\"> d) \u0915\u093e\u0930\u094d\u092c\u0928 (\u0915\u094b\u092f\u0932\u093e)<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q3\">\n <h3>\u092a\u094d\u09303. \u0938\u092c\u0938\u0947 \u0905\u0927\u093f\u0915 \u0924\u0928\u094d\u092f \u0927\u093e\u0924\u0941 \u0915\u094c\u0928-\u0938\u0940 \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q3\" value=\"a\"> a) \u0924\u093e\u0901\u092c\u093e<\/label>\n <label><input type=\"radio\" name=\"q3\" value=\"b\"> b) \u091a\u093e\u0901\u0926\u0940<\/label>\n <label><input type=\"radio\" name=\"q3\" value=\"c\"> c) \u0938\u094b\u0928\u093e<\/label>\n <label><input type=\"radio\" name=\"q3\" value=\"d\"> d) \u090f\u0932\u094d\u092f\u0941\u092e\u093f\u0928\u093f\u092f\u092e<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q4\">\n <h3>\u092a\u094d\u09304. \u0915\u094c\u0928-\u0938\u093e \u0905\u0927\u093e\u0924\u0941 \u0926\u094d\u0930\u0935 \u0905\u0935\u0938\u094d\u0925\u093e \u092e\u0947\u0902 \u092a\u093e\u092f\u093e \u091c\u093e\u0924\u093e \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q4\" value=\"a\"> a) \u0915\u094d\u0932\u094b\u0930\u0940\u0928<\/label>\n <label><input type=\"radio\" name=\"q4\" value=\"b\"> b) \u092c\u094d\u0930\u094b\u092e\u0940\u0928<\/label>\n <label><input type=\"radio\" name=\"q4\" value=\"c\"> c) \u0906\u092f\u094b\u0921\u0940\u0928<\/label>\n <label><input type=\"radio\" name=\"q4\" value=\"d\"> d) \u0911\u0915\u094d\u0938\u0940\u091c\u0928<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q5\">\n <h3>\u092a\u094d\u09305. \u0927\u093e\u0924\u0941\u090f\u0901 \u0938\u093e\u092e\u093e\u0928\u094d\u092f\u0924\u0903 \u0915\u093f\u0938 \u092a\u094d\u0930\u0915\u093e\u0930 \u0915\u0947 \u0911\u0915\u094d\u0938\u093e\u0907\u0921 \u092c\u0928\u093e\u0924\u0940 \u0939\u0948\u0902?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q5\" value=\"a\"> a) \u0905\u092e\u094d\u0932\u0940\u092f<\/label>\n <label><input type=\"radio\" name=\"q5\" value=\"b\"> b) \u0915\u094d\u0937\u093e\u0930\u0940\u092f<\/label>\n <label><input type=\"radio\" name=\"q5\" value=\"c\"> c) \u0909\u0926\u093e\u0938\u0940\u0928<\/label>\n <label><input type=\"radio\" name=\"q5\" value=\"d\"> d) \u0909\u092a\u0930\u094b\u0915\u094d\u0924 \u0938\u092d\u0940<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q6\">\n <h3>\u092a\u094d\u09306. \u091c\u092c \u0927\u093e\u0924\u0941\u090f\u0901 \u0905\u092e\u094d\u0932\u094b\u0902 \u0915\u0947 \u0938\u093e\u0925 \u0905\u092d\u093f\u0915\u094d\u0930\u093f\u092f\u093e \u0915\u0930\u0924\u0940 \u0939\u0948\u0902, \u0924\u094b \u0915\u094c\u0928-\u0938\u0940 \u0917\u0948\u0938 \u0928\u093f\u0915\u0932\u0924\u0940 \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q6\" value=\"a\"> a) \u0911\u0915\u094d\u0938\u0940\u091c\u0928<\/label>\n <label><input type=\"radio\" name=\"q6\" value=\"b\"> b) \u0939\u093e\u0907\u0921\u094d\u0930\u094b\u091c\u0928<\/label>\n <label><input type=\"radio\" name=\"q6\" value=\"c\"> c) \u0928\u093e\u0907\u091f\u094d\u0930\u094b\u091c\u0928<\/label>\n <label><input type=\"radio\" name=\"q6\" value=\"d\"> d) \u0915\u093e\u0930\u094d\u092c\u0928 \u0921\u093e\u0907\u0911\u0915\u094d\u0938\u093e\u0907\u0921<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q7\">\n <h3>\u092a\u094d\u09307. \u091a\u093e\u0901\u0926\u0940 \u0939\u0935\u093e \u092e\u0947\u0902 \u0917\u0902\u0927\u0915 \u0915\u0947 \u0938\u093e\u0925 \u0905\u092d\u093f\u0915\u094d\u0930\u093f\u092f\u093e \u0915\u0930\u0915\u0947 \u0915\u094d\u092f\u093e \u092c\u0928\u093e\u0924\u0940 \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q7\" value=\"a\"> a) \u0938\u093f\u0932\u094d\u0935\u0930 \u0915\u094d\u0932\u094b\u0930\u093e\u0907\u0921<\/label>\n <label><input type=\"radio\" name=\"q7\" value=\"b\"> b) \u0938\u093f\u0932\u094d\u0935\u0930 \u0938\u0932\u094d\u092b\u093c\u093e\u0907\u0921<\/label>\n <label><input type=\"radio\" name=\"q7\" value=\"c\"> c) \u0938\u093f\u0932\u094d\u0935\u0930 \u0911\u0915\u094d\u0938\u093e\u0907\u0921<\/label>\n <label><input type=\"radio\" name=\"q7\" value=\"d\"> d) \u0938\u093f\u0932\u094d\u0935\u0930 \u0915\u093e\u0930\u094d\u092c\u094b\u0928\u0947\u091f<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q8\">\n <h3>\u092a\u094d\u09308. \u0928\u093f\u092e\u094d\u0928\u0932\u093f\u0916\u093f\u0924 \u092e\u0947\u0902 \u0938\u0947 \u0915\u094c\u0928-\u0938\u0940 \u0927\u093e\u0924\u0941 \u0906\u0938\u093e\u0928\u0940 \u0938\u0947 \u091c\u0902\u0917 \u0928\u0939\u0940\u0902 \u0916\u093e\u0924\u0940?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q8\" value=\"a\"> a) \u0924\u093e\u0901\u092c\u093e<\/label>\n <label><input type=\"radio\" name=\"q8\" value=\"b\"> b) \u0932\u094b\u0939\u093e<\/label>\n <label><input type=\"radio\" name=\"q8\" value=\"c\"> c) \u090f\u0932\u094d\u092f\u0941\u092e\u093f\u0928\u093f\u092f\u092e<\/label>\n <label><input type=\"radio\" name=\"q8\" value=\"d\"> d) \u0938\u094b\u0928\u093e<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q9\">\n <h3>\u092a\u094d\u09309. \u0932\u094b\u0939\u0947 \u092a\u0930 \u091c\u0938\u094d\u0924\u093e \u091a\u0922\u093c\u093e\u0928\u0947 \u0915\u0940 \u092a\u094d\u0930\u0915\u094d\u0930\u093f\u092f\u093e \u0915\u094b \u0915\u094d\u092f\u093e \u0915\u0939\u0924\u0947 \u0939\u0948\u0902?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q9\" value=\"a\"> a) \u092e\u093f\u0936\u094d\u0930\u0927\u093e\u0924\u0941 \u092c\u0928\u093e\u0928\u093e<\/label>\n <label><input type=\"radio\" name=\"q9\" value=\"b\"> b) \u0917\u0948\u0932\u094d\u0935\u0928\u093e\u0907\u091c\u093f\u0902\u0917<\/label>\n <label><input type=\"radio\" name=\"q9\" value=\"c\"> c) \u090f\u0928\u094b\u0921\u093e\u0907\u091c\u093f\u0902\u0917<\/label>\n <label><input type=\"radio\" name=\"q9\" value=\"d\"> d) \u0915\u094d\u0930\u094b\u092e \u091a\u0922\u093c\u093e\u0928\u093e<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q10\">\n <h3>\u092a\u094d\u093010. \u0924\u093e\u0930\u094b\u0902 \u0915\u094b \u091c\u094b\u0921\u093c\u0928\u0947 (soldering) \u092e\u0947\u0902 \u0915\u093f\u0938 \u092e\u093f\u0936\u094d\u0930\u0927\u093e\u0924\u0941 \u0915\u093e \u092a\u094d\u0930\u092f\u094b\u0917 \u0939\u094b\u0924\u093e \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q10\" value=\"a\"> a) \u092a\u0940\u0924\u0932<\/label>\n <label><input type=\"radio\" name=\"q10\" value=\"b\"> b) \u0915\u093e\u0901\u0938\u093e<\/label>\n <label><input type=\"radio\" name=\"q10\" value=\"c\"> c) \u0938\u094b\u0932\u094d\u0921\u0930 (\u0938\u0940\u0938\u093e + \u091f\u093f\u0928)<\/label>\n <label><input type=\"radio\" name=\"q10\" value=\"d\"> d) \u0907\u0938\u094d\u092a\u093e\u0924<\/label>\n <\/div>\n <\/div>\n\n \n <div class=\"question\" id=\"div-q11\">\n <h3>\u092a\u094d\u093011. \u0915\u094c\u0928-\u0938\u093e \u0911\u0915\u094d\u0938\u093e\u0907\u0921 \u0909\u092d\u092f\u0927\u0930\u094d\u092e\u0940 (Amphoteric) \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q11\" value=\"a\"> a) ZnO<\/label>\n <label><input type=\"radio\" name=\"q11\" value=\"b\"> b) CaO<\/label>\n <label><input type=\"radio\" name=\"q11\" value=\"c\"> c) Na\u2082O<\/label>\n <label><input type=\"radio\" name=\"q11\" value=\"d\"> d) CO\u2082<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q12\">\n <h3>\u092a\u094d\u093012. \u0927\u093e\u0924\u0941\u0913\u0902 \u0915\u093e \u0938\u093e\u092e\u093e\u0928\u094d\u092f \u0907\u0932\u0947\u0915\u094d\u091f\u094d\u0930\u0949\u0928\u093f\u0915 \u0935\u093f\u0928\u094d\u092f\u093e\u0938 \u0939\u094b\u0924\u093e \u0939\u0948:<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q12\" value=\"a\"> a) \u092c\u093e\u0939\u0930\u0940 \u0915\u0915\u094d\u0937 \u092e\u0947\u0902 1\u20133 \u0907\u0932\u0947\u0915\u094d\u091f\u094d\u0930\u0949\u0928<\/label>\n <label><input type=\"radio\" name=\"q12\" value=\"b\"> b) \u092c\u093e\u0939\u0930\u0940 \u0915\u0915\u094d\u0937 \u092e\u0947\u0902 5\u20137 \u0907\u0932\u0947\u0915\u094d\u091f\u094d\u0930\u0949\u0928<\/label>\n <label><input type=\"radio\" name=\"q12\" value=\"c\"> c) \u092c\u093e\u0939\u0930\u0940 \u0915\u0915\u094d\u0937 \u092e\u0947\u0902 8 \u0907\u0932\u0947\u0915\u094d\u091f\u094d\u0930\u0949\u0928<\/label>\n <label><input type=\"radio\" name=\"q12\" value=\"d\"> d) \u092c\u093e\u0939\u0930\u0940 \u0915\u0915\u094d\u0937 \u092e\u0947\u0902 4 \u0907\u0932\u0947\u0915\u094d\u091f\u094d\u0930\u0949\u0928<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q13\">\n <h3>\u092a\u094d\u093013. \u0928\u093f\u092e\u094d\u0928\u0932\u093f\u0916\u093f\u0924 \u092e\u0947\u0902 \u0938\u0947 \u0915\u094c\u0928-\u0938\u0940 \u0905\u092d\u093f\u0915\u094d\u0930\u093f\u092f\u093e \u0935\u093f\u0938\u094d\u0925\u093e\u092a\u0928 \u0905\u092d\u093f\u0915\u094d\u0930\u093f\u092f\u093e \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q13\" value=\"a\"> a) Cu + 2AgNO\u2083 \u2192 Cu(NO\u2083)\u2082 + 2Ag<\/label>\n <label><input type=\"radio\" name=\"q13\" value=\"b\"> b) 2Mg + O\u2082 \u2192 2MgO<\/label>\n <label><input type=\"radio\" name=\"q13\" value=\"c\"> c) CaCO\u2083 \u2192 CaO + CO\u2082<\/label>\n <label><input type=\"radio\" name=\"q13\" value=\"d\"> d) NaCl \u2192 Na + Cl\u2082<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q14\">\n <h3>\u092a\u094d\u093014. \u091c\u092c \u091c\u0938\u094d\u0924\u093e (Zn) \u0915\u094b \u092a\u0924\u0932\u0947 \u0939\u093e\u0907\u0921\u094d\u0930\u094b\u0915\u094d\u0932\u094b\u0930\u093f\u0915 \u0905\u092e\u094d\u0932 \u0938\u0947 \u0905\u092d\u093f\u0915\u094d\u0930\u093f\u092f\u093f\u0924 \u0915\u093f\u092f\u093e \u091c\u093e\u0924\u093e \u0939\u0948, \u0924\u094b \u0915\u094c\u0928-\u0938\u0940 \u0917\u0948\u0938 \u092c\u0928\u0924\u0940 \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q14\" value=\"a\"> a) \u0911\u0915\u094d\u0938\u0940\u091c\u0928<\/label>\n <label><input type=\"radio\" name=\"q14\" value=\"b\"> b) \u0928\u093e\u0907\u091f\u094d\u0930\u094b\u091c\u0928<\/label>\n <label><input type=\"radio\" name=\"q14\" value=\"c\"> c) \u0939\u093e\u0907\u0921\u094d\u0930\u094b\u091c\u0928<\/label>\n <label><input type=\"radio\" name=\"q14\" value=\"d\"> d) \u0915\u093e\u0930\u094d\u092c\u0928 \u0921\u093e\u0907\u0911\u0915\u094d\u0938\u093e\u0907\u0921<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q15\">\n <h3>\u092a\u094d\u093015. \u0907\u0928\u092e\u0947\u0902 \u0938\u0947 \u0915\u094c\u0928-\u0938\u093e \u092e\u093f\u0936\u094d\u0930\u0927\u093e\u0924\u0941 \u0928\u0939\u0940\u0902 \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q15\" value=\"a\"> a) \u092a\u0940\u0924\u0932<\/label>\n <label><input type=\"radio\" name=\"q15\" value=\"b\"> b) \u0915\u093e\u0901\u0938\u093e<\/label>\n <label><input type=\"radio\" name=\"q15\" value=\"c\"> c) \u0938\u094b\u0932\u094d\u0921\u0930<\/label>\n <label><input type=\"radio\" name=\"q15\" value=\"d\"> d) \u0915\u094d\u0935\u093e\u0930\u094d\u091f\u094d\u091c\u093c<\/label>\n <\/div>\n <\/div>\n\n \n <div class=\"question\" id=\"div-q16\">\n <h3>\u092a\u094d\u093016. \u0915\u094c\u0928-\u0938\u0940 \u0927\u093e\u0924\u0941 \u0920\u0902\u0921\u0947 \u092a\u093e\u0928\u0940 \u0938\u0947 \u0924\u0940\u0935\u094d\u0930\u0924\u093e \u0938\u0947 \u0905\u092d\u093f\u0915\u094d\u0930\u093f\u092f\u093e \u0915\u0930\u0924\u0940 \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q16\" value=\"a\"> a) \u092e\u0948\u0917\u094d\u0928\u0940\u0936\u093f\u092f\u092e<\/label>\n <label><input type=\"radio\" name=\"q16\" value=\"b\"> b) \u0915\u0948\u0932\u094d\u0936\u093f\u092f\u092e<\/label>\n <label><input type=\"radio\" name=\"q16\" value=\"c\"> c) \u0938\u094b\u0921\u093f\u092f\u092e<\/label>\n <label><input type=\"radio\" name=\"q16\" value=\"d\"> d) \u090f\u0932\u094d\u092f\u0941\u092e\u093f\u0928\u093f\u092f\u092e<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q17\">\n <h3>\u092a\u094d\u093017. \u091c\u0938\u094d\u0924\u093e (Zn) \u0915\u0940 \u092d\u093e\u092a (steam) \u0915\u0947 \u0938\u093e\u0925 \u0905\u092d\u093f\u0915\u094d\u0930\u093f\u092f\u093e \u0938\u0947 \u0915\u094d\u092f\u093e \u092c\u0928\u0924\u093e \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q17\" value=\"a\"> a) ZnO + H\u2082<\/label>\n <label><input type=\"radio\" name=\"q17\" value=\"b\"> b) Zn(OH)\u2082<\/label>\n <label><input type=\"radio\" name=\"q17\" value=\"c\"> c) ZnCl\u2082 + H\u2082<\/label>\n <label><input type=\"radio\" name=\"q17\" value=\"d\"> d) Zn + H\u2082O\u2082<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q18\">\n <h3>\u092a\u094d\u093018. \u0924\u093e\u0901\u092c\u0947 \u0915\u0940 \u0935\u0938\u094d\u0924\u0941\u0913\u0902 \u092a\u0930 \u0939\u0930\u0940 \u092a\u0930\u0924 \u0915\u093f\u0938 \u0915\u093e\u0930\u0923 \u0938\u0947 \u092c\u0928\u0924\u0940 \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q18\" value=\"a\"> a) \u0915\u0949\u092a\u0930 \u0911\u0915\u094d\u0938\u093e\u0907\u0921<\/label>\n <label><input type=\"radio\" name=\"q18\" value=\"b\"> b) \u0915\u0949\u092a\u0930 \u0938\u0932\u094d\u092b\u093c\u093e\u0907\u0921<\/label>\n <label><input type=\"radio\" name=\"q18\" value=\"c\"> c) \u0915\u0949\u092a\u0930 \u0915\u093e\u0930\u094d\u092c\u094b\u0928\u0947\u091f<\/label>\n <label><input type=\"radio\" name=\"q18\" value=\"d\"> d) \u0915\u0949\u092a\u0930 \u0928\u093e\u0907\u091f\u094d\u0930\u0947\u091f<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q19\">\n <h3>\u092a\u094d\u093019. \u0935\u093f\u0926\u094d\u092f\u0941\u0924 \u0905\u092a\u091a\u092f\u0928 (Electrolytic reduction) \u0915\u093e \u0909\u092a\u092f\u094b\u0917 \u0915\u093f\u0938 \u0927\u093e\u0924\u0941 \u0915\u094b \u0928\u093f\u0915\u093e\u0932\u0928\u0947 \u092e\u0947\u0902 \u0939\u094b\u0924\u093e \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q19\" value=\"a\"> a) \u0932\u094b\u0939\u093e<\/label>\n <label><input type=\"radio\" name=\"q19\" value=\"b\"> b) \u091c\u0938\u094d\u0924\u093e<\/label>\n <label><input type=\"radio\" name=\"q19\" value=\"c\"> c) \u090f\u0932\u094d\u092f\u0941\u092e\u093f\u0928\u093f\u092f\u092e<\/label>\n <label><input type=\"radio\" name=\"q19\" value=\"d\"> d) \u0924\u093e\u0901\u092c\u093e<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q20\">\n <h3>\u092a\u094d\u093020. \u0938\u093f\u0928\u093e\u092c\u093e\u0930 \u0905\u092f\u0938\u094d\u0915 (Cinnabar ore) \u0938\u0947 \u0915\u094c\u0928-\u0938\u0940 \u0927\u093e\u0924\u0941 \u092a\u094d\u0930\u093e\u092a\u094d\u0924 \u0939\u094b\u0924\u0940 \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q20\" value=\"a\"> a) \u091a\u093e\u0901\u0926\u0940<\/label>\n <label><input type=\"radio\" name=\"q20\" value=\"b\"> b) \u0924\u093e\u0901\u092c\u093e<\/label>\n <label><input type=\"radio\" name=\"q20\" value=\"c\"> c) \u092a\u093e\u0930\u093e<\/label>\n <label><input type=\"radio\" name=\"q20\" value=\"d\"> d) \u090f\u0932\u094d\u092f\u0941\u092e\u093f\u0928\u093f\u092f\u092e<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q21\">\n <h3>\u092a\u094d\u093021. \u0935\u093f\u0926\u094d\u092f\u0941\u0924 \u0936\u094b\u0927\u0928 (Electrolytic refining) \u092e\u0947\u0902 \u0936\u0941\u0926\u094d\u0927 \u0927\u093e\u0924\u0941 \u0915\u093f\u0938 \u0907\u0932\u0947\u0915\u094d\u091f\u094d\u0930\u094b\u0921 \u092a\u0930 \u091c\u092e\u093e \u0939\u094b\u0924\u0940 \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q21\" value=\"a\"> a) \u0910\u0928\u094b\u0921 (Anode)<\/label>\n <label><input type=\"radio\" name=\"q21\" value=\"b\"> b) \u0915\u0948\u0925\u094b\u0921 (Cathode)<\/label>\n <label><input type=\"radio\" name=\"q21\" value=\"c\"> c) \u0926\u094b\u0928\u094b\u0902<\/label>\n <label><input type=\"radio\" name=\"q21\" value=\"d\"> d) \u0907\u0932\u0947\u0915\u094d\u091f\u094d\u0930\u094b\u0932\u093e\u0907\u091f<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q22\">\n <h3>\u092a\u094d\u093022. \u0917\u093c\u0932\u0924 \u092f\u0941\u0917\u094d\u092e (pair) \u092a\u0939\u091a\u093e\u0928\u093f\u090f:<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q22\" value=\"a\"> a) \u092a\u0940\u0924\u0932 \u2013 \u0924\u093e\u0901\u092c\u093e + \u091c\u0938\u094d\u0924\u093e<\/label>\n <label><input type=\"radio\" name=\"q22\" value=\"b\"> b) \u0915\u093e\u0901\u0938\u093e \u2013 \u0924\u093e\u0901\u092c\u093e + \u091f\u093f\u0928<\/label>\n <label><input type=\"radio\" name=\"q22\" value=\"c\"> c) \u0938\u094d\u091f\u0947\u0928\u0932\u0947\u0938 \u0938\u094d\u091f\u0940\u0932 \u2013 \u0932\u094b\u0939\u093e + \u0928\u093f\u0915\u0947\u0932 + \u0915\u094d\u0930\u094b\u092e\u093f\u092f\u092e<\/label>\n <label><input type=\"radio\" name=\"q22\" value=\"d\"> d) \u0905\u092e\u0932\u0917\u092e \u2013 \u0924\u093e\u0901\u092c\u093e + \u090f\u0932\u094d\u092f\u0941\u092e\u093f\u0928\u093f\u092f\u092e<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q23\">\n <h3>\u092a\u094d\u093023. \u0925\u0930\u094d\u092e\u093e\u0907\u091f \u0935\u0947\u0932\u094d\u0921\u093f\u0902\u0917 (Thermite welding) \u092e\u0947\u0902 \u0915\u093f\u0938\u0915\u093e \u0909\u092a\u092f\u094b\u0917 \u0939\u094b\u0924\u093e \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q23\" value=\"a\"> a) Al + ZnO<\/label>\n <label><input type=\"radio\" name=\"q23\" value=\"b\"> b) Al + Fe\u2082O\u2083<\/label>\n <label><input type=\"radio\" name=\"q23\" value=\"c\"> c) Mg + CuO<\/label>\n <label><input type=\"radio\" name=\"q23\" value=\"d\"> d) Zn + CuSO\u2084<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q24\">\n <h3>\u092a\u094d\u093024. \u0907\u0928\u092e\u0947\u0902 \u0938\u0947 \u0938\u092c\u0938\u0947 \u0905\u0927\u093f\u0915 \u0905\u092d\u093f\u0915\u094d\u0930\u093f\u092f\u093e\u0936\u0940\u0932 \u0927\u093e\u0924\u0941 \u0915\u094c\u0928-\u0938\u0940 \u0939\u0948?<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q24\" value=\"a\"> a) \u0924\u093e\u0901\u092c\u093e<\/label>\n <label><input type=\"radio\" name=\"q24\" value=\"b\"> b) \u091a\u093e\u0901\u0926\u0940<\/label>\n <label><input type=\"radio\" name=\"q24\" value=\"c\"> c) \u092a\u094b\u091f\u0948\u0936\u093f\u092f\u092e<\/label>\n <label><input type=\"radio\" name=\"q24\" value=\"d\"> d) \u0932\u094b\u0939\u093e<\/label>\n <\/div>\n <\/div>\n\n <div class=\"question\" id=\"div-q25\">\n <h3>\u092a\u094d\u093025. \u0906\u092f\u0928\u093f\u0915 \u092f\u094c\u0917\u093f\u0915 \u0935\u093f\u0926\u094d\u092f\u0941\u0924 \u0915\u093e \u0938\u0902\u091a\u093e\u0932\u0928 \u0915\u0930\u0924\u0947 \u0939\u0948\u0902:<\/h3>\n <div class=\"options\">\n <label><input type=\"radio\" name=\"q25\" value=\"a\"> a) \u0915\u0947\u0935\u0932 \u0920\u094b\u0938 \u0905\u0935\u0938\u094d\u0925\u093e \u092e\u0947\u0902<\/label>\n <label><input type=\"radio\" name=\"q25\" value=\"b\"> b) \u0926\u094d\u0930\u0935 \u0905\u0935\u0938\u094d\u0925\u093e \u0914\u0930 \u091c\u0932\u0940\u092f \u0935\u093f\u0932\u092f\u0928 \u092e\u0947\u0902<\/label>\n <label><input type=\"radio\" name=\"q25\" value=\"c\"> c) \u0926\u094b\u0928\u094b\u0902 \u0920\u094b\u0938 \u0914\u0930 \u0926\u094d\u0930\u0935 \u0905\u0935\u0938\u094d\u0925\u093e \u092e\u0947\u0902<\/label>\n <label><input type=\"radio\" name=\"q25\" value=\"d\"> d) \u0915\u0947\u0935\u0932 \u0920\u094b\u0938 \u0905\u0935\u0938\u094d\u0925\u093e \u092e\u0947\u0902<\/label>\n <\/div>\n <\/div>\n\n <\/form>\n\n <div class=\"controls\">\n <button id=\"checkBtn\" onclick=\"checkAnswers()\">\u0909\u0924\u094d\u0924\u0930 \u091c\u093e\u0901\u091a\u0947\u0902 (Check Answers)<\/button>\n <button id=\"clearBtn\" onclick=\"clearScoreboard()\">\u0938\u094d\u0915\u094b\u0930\u092c\u094b\u0930\u094d\u0921 \u0938\u093e\u092b\u093c \u0915\u0930\u0947\u0902<\/button>\n <\/div>\n\n <div id=\"result\" class=\"muted\"><\/div>\n\n <div id=\"scoreboard\">\n <h3>\ud83c\udfc6 \u0938\u094d\u0915\u094b\u0930\u092c\u094b\u0930\u094d\u0921<\/h3>\n <div class=\"muted\">(\u0938\u094d\u0925\u093e\u092f\u0940 \u2014 \u092a\u0939\u0932\u0947 \u0915\u0947 \u0930\u093f\u0915\u0949\u0930\u094d\u0921\u094d\u0938 \u092d\u0940 \u0938\u0902\u091a\u093f\u0924 \u0930\u0939\u0924\u0947 \u0939\u0948\u0902)<\/div>\n <table>\n <thead>\n <tr><th>\u0928\u093e\u092e<\/th><th>\u0938\u094d\u0915\u094b\u0930<\/th><th>\u0926\u093f\u0928\u093e\u0902\u0915 \/ \u0938\u092e\u092f<\/th><\/tr>\n <\/thead>\n <tbody id=\"scoreTableBody\"><\/tbody>\n <\/table>\n <\/div>\n <\/div>\n\n <script>\n const answers = {\n q1: \"a\", q2: \"b\", q3: \"c\", q4: \"b\", q5: \"b\",\n q6: \"b\", q7: \"b\", q8: \"d\", q9: \"b\", q10: \"c\",\n q11: \"a\", q12: \"a\", q13: \"a\", q14: \"c\", q15: \"d\",\n q16: \"c\", q17: \"a\", q18: \"c\", q19: \"c\", q20: \"c\",\n q21: \"b\", q22: \"d\", q23: \"b\", q24: \"c\", q25: \"b\"\n };\n\n \/\/ load scoreboard from localStorage or initialize\n function loadScoreboard() {\n const stored = localStorage.getItem(\"metals_scoreboard_v1\");\n if (stored) return JSON.parse(stored);\n return [];\n }\n\n function saveScoreboard(board) {\n localStorage.setItem(\"metals_scoreboard_v1\", JSON.stringify(board));\n }\n\n function renderScoreboard() {\n const board = loadScoreboard();\n const tbody = document.getElementById(\"scoreTableBody\");\n tbody.innerHTML = \"\";\n board.forEach(entry => {\n const tr = document.createElement(\"tr\");\n const nameTd = document.createElement(\"td\");\n nameTd.textContent = entry.name;\n const scoreTd = document.createElement(\"td\");\n scoreTd.textContent = entry.score + \"\/25\";\n const timeTd = document.createElement(\"td\");\n timeTd.textContent = new Date(entry.time).toLocaleString('hi-IN');\n tr.appendChild(nameTd);\n tr.appendChild(scoreTd);\n tr.appendChild(timeTd);\n tbody.appendChild(tr);\n });\n }\n\n function checkAnswers() {\n \/\/ remove previous highlights and correct-answer notes\n document.querySelectorAll('.question').forEach(qDiv => {\n qDiv.classList.remove('correct','incorrect');\n const oldNote = qDiv.querySelector('.correct-answer');\n if (oldNote) oldNote.remove();\n });\n\n const form = document.getElementById(\"quizForm\");\n let score = 0;\n for (let q in answers) {\n \/\/ find the question container\n const firstInput = form.querySelector(`[name=\"${q}\"]`);\n if (!firstInput) continue;\n const qDiv = firstInput.closest('.question');\n const selected = form.querySelector(`input[name=\"${q}\"]:checked`);\n if (selected && selected.value === answers[q]) {\n qDiv.classList.add('correct');\n score++;\n } else {\n qDiv.classList.add('incorrect');\n \/\/ show the correct option text\n \/\/ find label text for the correct option\n const correctVal = answers[q];\n \/\/ find the label whose input has that value\n const correctInput = qDiv.querySelector(`input[name=\"${q}\"][value=\"${correctVal}\"]`);\n if (correctInput) {\n \/\/ get the label element (parent)\n const label = correctInput.closest('label');\n let correctText = \"\";\n if (label) {\n correctText = label.textContent.trim();\n } else {\n \/\/ fallback - build from option letter\n correctText = \"\u0938\u0939\u0940 \u0909\u0924\u094d\u0924\u0930: \" + correctVal;\n }\n const note = document.createElement('span');\n note.className = 'correct-answer';\n note.textContent = `\u0938\u0939\u0940 \u0909\u0924\u094d\u0924\u0930: ${correctText.replace(\/^[a-d]\\)\\s*\/i, '')}`.replace(\/\\s{2,}\/g,' ');\n qDiv.appendChild(note);\n }\n }\n }\n\n const username = (document.getElementById(\"username\").value || \"\u0915\u094b\u0908 \u0928\u093e\u092e\") .trim();\n document.getElementById(\"result\").textContent = `${username}, \u0906\u092a\u0915\u093e \u0938\u094d\u0915\u094b\u0930 \u0939\u0948: ${score}\/25`;\n\n \/\/ update scoreboard in localStorage (keep previous entries)\n const board = loadScoreboard();\n board.push({ name: username, score: score, time: new Date().toISOString() });\n \/\/ sort by score desc, then by time asc (earlier first) or latest first - choose latest first if scores equal\n board.sort((a,b) => {\n if (b.score !== a.score) return b.score - a.score;\n return new Date(b.time) - new Date(a.time);\n });\n \/\/ keep only e.g. top 100 entries to avoid huge storage (optional)\n const topBoard = board.slice(0, 200);\n saveScoreboard(topBoard);\n renderScoreboard();\n\n \/\/ scroll to result\n document.getElementById(\"result\").scrollIntoView({behavior:'smooth'});\n }\n\n function clearScoreboard() {\n if (!confirm(\"\u0915\u094d\u092f\u093e \u0906\u092a \u0935\u093e\u0915\u0908 \u0938\u094d\u0915\u094b\u0930\u092c\u094b\u0930\u094d\u0921 \u0938\u093e\u092b\u093c \u0915\u0930\u0928\u093e \u091a\u093e\u0939\u0924\u0947 \u0939\u0948\u0902? (LocalStorage \u092e\u0947\u0902 \u0938\u0947 \u0939\u091f\u0947\u0917\u093e)\")) return;\n localStorage.removeItem(\"metals_scoreboard_v1\");\n renderScoreboard();\n }\n\n \/\/ initial render\n renderScoreboard();\n <\/script>\n<\/body>\n<\/html>\n\n","protected":false},"excerpt":{"rendered":"<p>class 10 chapter 3 science test Advanced Age Calculator \ud83d\udd52 […]<\/p>\n","protected":false},"author":1,"featured_media":19,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5181","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/posts\/5181","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/comments?post=5181"}],"version-history":[{"count":2,"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/posts\/5181\/revisions"}],"predecessor-version":[{"id":5184,"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/posts\/5181\/revisions\/5184"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/media\/19"}],"wp:attachment":[{"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/media?parent=5181"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/categories?post=5181"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/apicalclasses.com\/wp-json\/wp\/v2\/tags?post=5181"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}