{"id":13720,"date":"2023-01-10T14:07:22","date_gmt":"2023-01-10T08:37:22","guid":{"rendered":"http:\/\/mycbseguide.com\/blog\/?p=13720"},"modified":"2025-10-08T17:48:35","modified_gmt":"2025-10-08T12:18:35","slug":"cbse-sample-papers-class-10-science","status":"publish","type":"post","link":"https:\/\/mycbseguide.com\/blog\/cbse-sample-papers-class-10-science\/","title":{"rendered":"Class 10 Science Sample Papers 2025"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-sample-papers-class-10-science\/#Class_10_Science_Sample_Papers_2025\" >Class 10 Science Sample Papers 2025<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-sample-papers-class-10-science\/#Whats_New_in_the_CBSE_Class_10_Science_Sample_Paper_2024-25\" >What\u2019s New in the CBSE Class 10 Science Sample Paper 2024-25?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-sample-papers-class-10-science\/#Why_You_Should_Practice_the_Latest_Sample_Papers\" >Why You Should Practice the Latest Sample Papers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-sample-papers-class-10-science\/#Where_to_Download_the_Sample_Papers\" >Where to Download the Sample Papers?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-sample-papers-class-10-science\/#Start_Your_Exam_Preparation_Today\" >Start Your Exam Preparation Today!<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-sample-papers-class-10-science\/#Sample_Paper_Science_Class_10_%E2%80%93_in_PDF_with_Solution\" >Sample Paper Science Class 10 &#8211; in PDF with Solution<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-sample-papers-class-10-science\/#Class_10_Science_Model_Papers_2024-25\" >Class 10 Science Model Papers 2024-25<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-sample-papers-class-10-science\/#Sample_Papers_of_Science_Class_10_2025\" >Sample Papers of Science\u00a0Class 10\u00a02025<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-sample-papers-class-10-science\/#Solution\" >Solution<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-sample-papers-class-10-science\/#Sample_Papers_for_Class_10_2025\" >Sample Papers for Class 10 2025<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Class_10_Science_Sample_Papers_2025\"><\/span>Class 10 Science Sample Papers 2025<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The Central Board of Secondary Education (CBSE) will be conducting the <a href=\"https:\/\/mycbseguide.com\/cbse-sample-papers-class-10.html\"><strong>Class 10<\/strong><\/a> board exams in February-March 2025. To help students prepare effectively, CBSE has released the latest sample papers for the 2024-25 academic session. These sample papers are available for free download on the official <strong><a href=\"https:\/\/mycbseguide.com\/cbse-sample-papers-class-10.html\">myCBSE website<\/a><\/strong> and the <strong><a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide\">myCBSEguide app<\/a><\/strong><strong> Download Class 10 Science Sample Papers 2025 for Effective Exam Preparation. <\/strong>Practicing <strong>Class 10 Science Sample Papers 2025<\/strong> is one of the most effective ways to prepare for your board exams. These sample papers are designed to give you a clear idea of the exam structure, question types, and <strong>marking schemes<\/strong> you\u2019ll encounter in the actual exam. By solving the <strong>Class 10 Science Sample Papers 2025<\/strong>, you will better understand the <strong>difficulty level<\/strong> and the time management skills required to complete the paper efficiently. The <strong>Class 10 Science Sample Papers 2025<\/strong> feature a mix of objective, subjective, and <strong>competency-based questions<\/strong>, ensuring you are well-prepared for the exam\u2019s evolving format. As you practice these papers, focus on analyzing the types of questions asked and the distribution of marks. Regular practice with the <strong>Class 10 Science Sample Papers 2025<\/strong> will build your confidence, helping you perform better in your final exams.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Whats_New_in_the_CBSE_Class_10_Science_Sample_Paper_2024-25\"><\/span><strong>What\u2019s New in the CBSE Class 10 Science Sample Paper 2024-25?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The sample papers for Class 10 Science follow the same format and structure that will appear in the actual board exams in 2025. By practicing these model papers, students can familiarize themselves with the exam pattern, question types, and time management strategies.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Why_You_Should_Practice_the_Latest_Sample_Papers\"><\/span><strong>Why You Should Practice the Latest Sample Papers<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>CBSE has officially issued the model question papers for the 2024-25 session and now is the ideal time for students to start their exam preparation. Here\u2019s why practicing these sample papers is crucial:<\/p>\n<ol>\n<li><strong>Understand the Exam Pattern<\/strong>: The sample papers reflect the updated format of the exam, helping students know what to expect.<\/li>\n<li><strong>Boost Confidence<\/strong>: Regular practice will improve your time management skills and confidence for the actual exam.<\/li>\n<li><strong>Identify Key Topics<\/strong>: The sample papers highlight important chapters and types of questions that are likely to appear in the exam.<\/li>\n<li><strong>Free and Accessible<\/strong>: The sample papers are available for free on the official CBSE website and the myCBSEguide app, making them easily accessible to every student.<\/li>\n<\/ol>\n<h3><span class=\"ez-toc-section\" id=\"Where_to_Download_the_Sample_Papers\"><\/span><strong>Where to Download the Sample Papers?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>CBSE Official Website<\/strong>: Visit the <strong><a href=\"https:\/\/mycbseguide.com\/\">myCBSEGuide<\/a><\/strong> website and<strong><a href=\"https:\/\/examin8.com\/\"> Examin8<\/a><\/strong> website for the latest sample papers and model question papers.<\/li>\n<li><strong>myCBSEguide App<\/strong>: Download the <a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide\"><strong>myCBSEGuide<\/strong><\/a> app and <strong><a href=\"https:\/\/play.google.com\/store\/apps\/details?id=com.examin8.exam\">Examin8<\/a><\/strong>\u00a0app for easy access to free sample papers and additional study resources.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Start_Your_Exam_Preparation_Today\"><\/span><strong>Start Your Exam Preparation Today!<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The CBSE Class 10 Science board exam in 2025 is just around the corner. To ensure you&#8217;re fully prepared, start practicing the sample papers now. It will help you familiarize yourself with the format, improve your problem-solving skills, and give you the confidence you need to ace the exam. <strong>Class 10 Science Sample Papers 2025<\/strong> will build your confidence, helping you perform better in your final exams.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Sample_Paper_Science_Class_10_%E2%80%93_in_PDF_with_Solution\"><\/span>Sample Paper Science Class 10 &#8211; in PDF with Solution<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align: left;\">Prepare for your CBSE Class 10 Science Board Exams 2025 with our free sample Question papers(SQP) available on the myCBSEguide app and website. These model question papers follow the latest marking scheme and blueprint for the 2024-25 session. Each paper comes with detailed solutions to help you understand the correct approach. Practicing these sample question papers(SQP) will improve your writing speed, boost confidence, and help you manage time better during the exam. Start solving the papers today to enhance your exam preparation and increase your chances of scoring high marks in the upcoming board exams.Sample papers for class 10 Science 2025 &#8211; with solution<\/p>\n<p style=\"text-align: center;\"><strong>Class 10 Sample Paper<\/strong> <strong><a class=\"button\" href=\"https:\/\/mycbseguide.com\/dashboard\/category\/1176\/type\/2\">Download as PDF<\/a><\/strong><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Class_10_Science_Model_Papers_2024-25\"><\/span><strong>Class 10 Science Model Papers 2024-25<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>CBSE Class 10 Science Sample Question Paper 2024-25: Understand the Exam Format and Difficulty Level<\/strong><\/p>\n<p>The <strong>CBSE Class 10 Science Sample Question Paper 2024-25<\/strong> is designed to give students a realistic preview of the actual board exam. By practicing with these model papers, you can get a clear understanding of the <strong>difficulty level<\/strong> of the exam, the <strong>typology of questions<\/strong>, and the <strong>mark distribution pattern<\/strong>.<\/p>\n<p>This year, the <strong>Class 10 Science sample paper<\/strong> consists of <strong>five sections (A to E)<\/strong>, featuring a mix of different question formats. Notably, there are <strong>competency-based questions<\/strong> and <strong>case study-based subjective questions<\/strong>, offering a closer reflection of the latest exam trends.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full\" src=\"https:\/\/media-mycbseguide.s3.ap-south-1.amazonaws.com\/images\/blog\/10_science_sample_paper.jpg\" alt=\"CBSE Class 10 Science Sample Paper\" width=\"600\" height=\"300\" \/><\/p>\n<h2 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"Sample_Papers_of_Science_Class_10_2025\"><\/span><strong>Sample Papers of Science\u00a0<\/strong><strong>Class 10\u00a0<\/strong><strong>2025<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align: center;\"><strong>Class 10 &#8211; Science<br \/>\nSample Paper &#8211; 01 (2024-25)<\/strong><\/p>\n<hr \/>\n<p><b>Maximum Marks: 80<br \/>\nTime Allowed: : 3 hours<\/b><\/p>\n<hr \/>\n<p><b>General Instructions:<\/b><\/p>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>This question paper consists of 39 questions in 5 sections.<\/li>\n<li>All questions are compulsory. However, an internal choice is provided in some questions. A student is expected to attempt only one of these questions.<\/li>\n<li>Section A consists of 20 objective-type questions carrying 1 mark each.<\/li>\n<li>Section B consists of 6 Very Short questions carrying 02 marks each. Answers to these questions should be in the range of 30 to 50 words.<\/li>\n<li>Section C\u00a0consists of 7 Short Answer type questions carrying 03 marks each. Answers to these questions should be in the range of 50 to 80 words.<\/li>\n<li>Section D consists of 3 Long Answer type questions carrying 05 marks each. Answers to these questions should be in the range of 80 to 120 words.<\/li>\n<li>Section E consists of 3 source-based\/case-based units of assessment of 04 marks each with sub-parts.<\/li>\n<\/ol>\n<hr \/>\n<ol style=\"padding-left: 20px; list-style: decimal;\">\n<li style=\"text-align: center; clear: both; display: block;\"><b>Section A<\/b><\/li>\n<li>Select from the following compounds which is not a base:\n<div style=\"margin-left: 20px;\">a) Zinc oxide<\/div>\n<div style=\"margin-left: 20px;\">b) Sodium hydroxide<\/div>\n<div style=\"margin-left: 20px;\">c) Calcium hydroxide<\/div>\n<div style=\"margin-left: 20px;\">d) Sodium sulphate<\/div>\n<\/li>\n<li>Calcium oxide reacts vigorously with water to produce slaked lime.<br \/>\nCaO(s) + H<sub>2<\/sub>O(l)\u00a0<span class=\"math-tex\">{tex}\\rightarrow{\/tex}<\/span>\u00a0Ca(OH)<sub>2<\/sub> (aq)<br \/>\nThis reaction can be classified as :<\/p>\n<ol style=\"list-style-type: upper-alpha;\" start=\"1\">\n<li>Combination reaction<\/li>\n<li>Exothermic reaction<\/li>\n<li>Endothermic reaction<\/li>\n<li>Oxidation reaction<\/li>\n<\/ol>\n<p>Which of the following is the correct option?<\/p>\n<div style=\"margin-left: 20px;\">a) C and D<\/div>\n<div style=\"margin-left: 20px;\">b) A and B<\/div>\n<div style=\"margin-left: 20px;\">c) A and C<\/div>\n<div style=\"margin-left: 20px;\">d) A, C and D<\/div>\n<\/li>\n<li>Baking soda is a mixture of:\n<div style=\"margin-left: 20px;\">a) Sodium hydrogen carbonate and tartaric acid<\/div>\n<div style=\"margin-left: 20px;\">b) Sodium carbonate and tartaric acid<\/div>\n<div style=\"margin-left: 20px;\">c) Sodium hydrogen carbonate and acetic acid<\/div>\n<div style=\"margin-left: 20px;\">d) Sodium carbonate and acetic acid<\/div>\n<\/li>\n<li>Consider the structures of the three cyclic carbon compounds A, B and C given below and select the correct option from the following:<br \/>\n<img decoding=\"async\" style=\"height: 205px; width: 300px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/question_images\/1691750514-rq8p3r.jpg\" \/><\/p>\n<div style=\"margin-left: 20px;\">a) A and C are isomers of hexane and B is benzene.<\/div>\n<div style=\"margin-left: 20px;\">b) A is a saturated cyclic hydrocarbon and B and C are unsaturated cyclic hydrocarbons.<\/div>\n<div style=\"margin-left: 20px;\">c) A is cyclohexane and B and C are the isomers of benzene.<\/div>\n<div style=\"margin-left: 20px;\">d) A is an isomer of hexane, B is benzene and C is an isomer of hexene.<\/div>\n<\/li>\n<li>Which one of the following metals is malleable and a poor conductor of electricity?\n<div style=\"margin-left: 20px;\">a) Zinc<\/div>\n<div style=\"margin-left: 20px;\">b) Silver<\/div>\n<div style=\"margin-left: 20px;\">c) Lead<\/div>\n<div style=\"margin-left: 20px;\">d) Copper<\/div>\n<\/li>\n<li>Consider the following compounds:\n<ol style=\"list-style-type: upper-roman;\" start=\"1\">\n<li>HCl<\/li>\n<li>C<sub>2<\/sub>H<sub>5<\/sub>OH<\/li>\n<li>C<sub>6<\/sub>H<sub>12<\/sub>O<sub>6<\/sub><\/li>\n<li>H<sub>2<\/sub>SO<sub>4<\/sub><\/li>\n<\/ol>\n<p>Which of these compounds do <strong>not<\/strong> conduct electricity in solution?<\/p>\n<div style=\"margin-left: 20px;\">a) III and IV<\/div>\n<div style=\"margin-left: 20px;\">b) I and IV<\/div>\n<div style=\"margin-left: 20px;\">c) II and III<\/div>\n<div style=\"margin-left: 20px;\">d) I and II<\/div>\n<\/li>\n<li>Which of the following are correct structural isomers of butane?\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li><span class=\"math-tex\">{tex}{\\text{H &#8211; }}\\mathop {\\text{C}}\\limits_{\\mathop {\\text{|}}\\limits_{\\text{H}} }^{\\mathop {\\text{|}}\\limits^{\\text{H}} } {\\text{ &#8211; }}\\mathop {\\text{C}}\\limits_{\\mathop {\\text{|}}\\limits_{\\text{H}} }^{\\mathop {\\text{|}}\\limits^{\\text{H}} } {\\text{ &#8211; }}\\mathop {\\text{C}}\\limits_{\\mathop {\\text{|}}\\limits_{\\text{H}} }^{\\mathop {\\text{|}}\\limits^{\\text{H}} } {\\text{ &#8211; }}\\mathop {\\text{C}}\\limits_{\\mathop {\\text{|}}\\limits_{\\text{H}} }^{\\mathop {\\text{|}}\\limits^{\\text{H}} } {\\text{ &#8211; H}}{\/tex}<\/span><\/li>\n<li><span class=\"math-tex\">{tex}{\\text{H &#8211; }}\\mathop {\\text{C}}\\limits_{\\mathop {\\text{|}}\\limits_{\\text{H}} }^{\\mathop {\\text{|}}\\limits^{\\text{H}} } {\\text{ &#8211; }}\\mathop {\\text{C}}\\limits_{\\mathop {\\text{|}}\\limits_{\\mathop {{\\text{H &#8211; C &#8211; H}}}\\limits_{\\mathop {\\text{|}}\\limits_{\\text{H}} } } }^{\\mathop {\\text{|}}\\limits^{\\text{H}} } {\\text{ &#8211; }}\\mathop {\\text{C}}\\limits_{\\mathop {\\text{|}}\\limits_{\\text{H}} }^{\\mathop {\\text{|}}\\limits^{\\text{H}} } {\\text{ &#8211; H}}{\/tex}<\/span><\/li>\n<li><img decoding=\"async\" style=\"width: 100px; height: 76px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/imgur\/Z6cTGqi.png\" alt=\"\" data-imgur-src=\"Z6cTGqi.png\" \/><\/li>\n<li><img decoding=\"async\" style=\"width: 80px; height: 76px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/imgur\/TftMcqN.png\" alt=\"\" data-imgur-src=\"TftMcqN.png\" \/><\/li>\n<\/ol>\n<div style=\"margin-left: 20px;\">a) (iii) and (iv)<\/div>\n<div style=\"margin-left: 20px;\">b) (ii) and (iv)<\/div>\n<div style=\"margin-left: 20px;\">c) (i) and (ii)<\/div>\n<div style=\"margin-left: 20px;\">d) (i) and (iii)<\/div>\n<\/li>\n<li>In the following diagram, identify the cells through which massive amounts of gaseous exchange takes place for photosynthesis:<br \/>\n<img decoding=\"async\" style=\"height: 169px; width: 200px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/question_images\/1692169885-ytz5nx.jpg\" \/><\/p>\n<div style=\"margin-left: 20px;\">a) I<\/div>\n<div style=\"margin-left: 20px;\">b) III<\/div>\n<div style=\"margin-left: 20px;\">c) IV<\/div>\n<div style=\"margin-left: 20px;\">d) II<\/div>\n<\/li>\n<li>In an experiment with pea plants, a pure tall plant (TT) is crossed with a pure short plant (tt). The ratio of pure tall plant to pure short plants in F<sub>2<\/sub> generation will be\n<div style=\"margin-left: 20px;\">a) 1 : 3<\/div>\n<div style=\"margin-left: 20px;\">b) 3 : 1<\/div>\n<div style=\"margin-left: 20px;\">c) 2 : 1<\/div>\n<div style=\"margin-left: 20px;\">d) 1 : 1<\/div>\n<\/li>\n<li>Pseudopodia are\n<div style=\"margin-left: 20px;\">a) long, tube-like structures coming out of the mouth.<\/div>\n<div style=\"margin-left: 20px;\">b) small hair-like structures present on unicellular organisms.<\/div>\n<div style=\"margin-left: 20px;\">c) false feet developed in some unicellular organisms.<\/div>\n<div style=\"margin-left: 20px;\">d) suckers which are attached to the walls of the intestines.<br \/>\n<strong>Prepare for CBSE, JEE, NEET, and NDA Exams with myCBSEguide App<\/strong>Boost your exam preparation with the <strong><a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide\">myCBSEguide<\/a> App<\/strong>! It offers comprehensive study material for <strong>CBSE<\/strong>, <strong>NCERT<\/strong>, <strong>JEE (Main)<\/strong>, <strong>NEET-UG<\/strong>, and <strong>NDA<\/strong> exams. With a wide range of practice questions, sample papers, and model solutions, the app helps you ace your exams with confidence.Teachers can also use the <a href=\"https:\/\/play.google.com\/store\/apps\/details?id=com.examin8.exam\"><strong>Examin8 App<\/strong><\/a> to create personalized question papers with their own name and logo, making it easier to assess students effectively.Visit <a href=\"https:\/\/mycbseguide.com\/\"><strong>myCBSEguide<\/strong><\/a> <strong>Website <\/strong>and <strong><a href=\"https:\/\/examin8.com\/\">Examin8<\/a> Website<\/strong> today to enhance your learning experience and succeed in your exams.<\/div>\n<\/li>\n<li>A zygote which has an X-chromosome inherited from the father will develop into a\n<div style=\"margin-left: 20px;\">a) either boy or girl<\/div>\n<div style=\"margin-left: 20px;\">b) girl<\/div>\n<div style=\"margin-left: 20px;\">c) X- chromosome does not determine the sex of a child<\/div>\n<div style=\"margin-left: 20px;\">d) boy<\/div>\n<\/li>\n<li>Which one of the following statements is correct about the human circulatory system?\n<div style=\"margin-left: 20px;\">a) Blood transports only oxygen and not carbon dioxide.<\/div>\n<div style=\"margin-left: 20px;\">b) Human heart has five chambers.<\/div>\n<div style=\"margin-left: 20px;\">c) Both oxygen-rich and oxygen-deficient blood gets mixed in the heart.<\/div>\n<div style=\"margin-left: 20px;\">d) Valves ensure that the blood does not flow backwards.<\/div>\n<\/li>\n<li>The correct pattern of magnetic field lines of the field produced by a current carrying circular loop is:\n<div style=\"margin-left: 20px;\">a) <img decoding=\"async\" style=\"height: 171px; width: 150px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/question_images\/1692272199-smrm8a.jpg\" \/><\/div>\n<div style=\"margin-left: 20px;\">b) <img decoding=\"async\" style=\"height: 136px; width: 150px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/question_images\/1692272131-gakk3x.jpg\" \/><\/div>\n<div style=\"margin-left: 20px;\">c) <img decoding=\"async\" style=\"height: 135px; width: 150px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/question_images\/1692272179-upy7r3.jpg\" \/><\/div>\n<div style=\"margin-left: 20px;\">d) <img decoding=\"async\" style=\"height: 112px; width: 150px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/question_images\/1692272158-xndpkt.jpg\" \/><\/div>\n<\/li>\n<li>Two bulbs of 100 W\u00a0and 40 W\u00a0are connected in series. The current through the 100 W\u00a0bulb is 1 A. The current through the 40 W\u00a0bulb will be:\n<div style=\"margin-left: 20px;\">a) 1 A<\/div>\n<div style=\"margin-left: 20px;\">b) 0.4 A<\/div>\n<div style=\"margin-left: 20px;\">c) 0.8 A<\/div>\n<div style=\"margin-left: 20px;\">d) 0.6 A<\/div>\n<\/li>\n<li>Ozone layer is damaged by<b>\u00a0<\/b>\n<div style=\"margin-left: 20px;\">a) \u00a0Chlorofluorocarbons<\/div>\n<div style=\"margin-left: 20px;\">b) Carbon\u00a0dioxide<\/div>\n<div style=\"margin-left: 20px;\">c) Methane<\/div>\n<div style=\"margin-left: 20px;\">d) Sulphur\u00a0dioxide<\/div>\n<\/li>\n<li>In a given food chain, suppose the amount of energy available at the third trophic level is 50 KJ. What will be the energy available at the producer level?\n<div style=\"margin-left: 20px;\">a) 5000 KJ<\/div>\n<div style=\"margin-left: 20px;\">b) 50 KJ<\/div>\n<div style=\"margin-left: 20px;\">c) 5 KJ<\/div>\n<div style=\"margin-left: 20px;\">d) 500 KJ<\/div>\n<\/li>\n<li><strong>Assertion (A):<\/strong> Corrosion of iron is commonly known as rusting.<br \/>\n<strong>Reason (R):<\/strong> Corrosion of iron occurs in presence of moist air.<\/p>\n<div style=\"margin-left: 20px;\">a) Both A and R are true and R is the correct explanation of A.<\/div>\n<div style=\"margin-left: 20px;\">b) Both A and R are true but R is not the correct explanation of A.<\/div>\n<div style=\"margin-left: 20px;\">c) A is true but R is false.<\/div>\n<div style=\"margin-left: 20px;\">d) A is false but R is true.<\/div>\n<\/li>\n<li><strong>Assertion (A):<\/strong> Stock is the lower part of a plant having the roots.<br \/>\n<strong>Reason (R):<\/strong> In grafting, the stock is placed over the scion.<\/p>\n<div style=\"margin-left: 20px;\">a) Both A and R are true and R is the correct explanation of A.<\/div>\n<div style=\"margin-left: 20px;\">b) Both A and R are true but R is not the correct explanation of A.<\/div>\n<div style=\"margin-left: 20px;\">c) A is true but R is false.<\/div>\n<div style=\"margin-left: 20px;\">d) A is false but R is true.<\/div>\n<\/li>\n<li><strong>Assertion (A):<\/strong> Electric appliances with metallic body have three connections, whereas an electric bulb has two pin connections.<br \/>\n<strong>Reason (R):<\/strong> Three-pin connections reduce heating of connecting wires.<\/p>\n<div style=\"margin-left: 20px;\">a) Both A and R are true and R is the correct explanation of A.<\/div>\n<div style=\"margin-left: 20px;\">b) Both A and R are true but R is not the correct explanation of A.<\/div>\n<div style=\"margin-left: 20px;\">c) A is true but R is false.<\/div>\n<div style=\"margin-left: 20px;\">d) A is false but R is true.<\/div>\n<\/li>\n<li><strong>Assertion (A):<\/strong> Ozone depletion can be reduced by limiting the use of air conditioners and refrigerators.<br \/>\n<strong>Reason (R):<\/strong> Air conditioner and refrigerators release chlorofluorocarbons in the atmosphere that destroy ozone.<\/p>\n<div style=\"margin-left: 20px;\">a) Both A and R are true and R is the correct explanation of A.<\/div>\n<div style=\"margin-left: 20px;\">b) Both A and R are true but R is not the correct explanation of A.<\/div>\n<div style=\"margin-left: 20px;\">c) A is true but R is false.<\/div>\n<div style=\"margin-left: 20px;\">d) A is false but R is true.<\/div>\n<\/li>\n<li style=\"text-align: center; clear: both; display: block;\"><b>Section B<\/b><\/li>\n<li>Complete the following reactions and name the main product formed in each case:\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>CH<sub>3<\/sub>COOH + NaOH\u00a0<span class=\"math-tex\">{tex}\\rightarrow{\/tex}<\/span>\u00a0&#8230;.. + &#8230;..<\/li>\n<li>C<sub>2<\/sub>H<sub>5<\/sub>OH + O<sub>2<\/sub>\u00a0<span class=\"math-tex\">{tex}\\rightarrow{\/tex}<\/span>\u00a0&#8230;.. + &#8230;&#8230;<\/li>\n<\/ol>\n<\/li>\n<li>Name the process of reproduction observed in yeast. Design an activity to observe this mode of reproduction in a school laboratory. Name one more organism which reproduces by this mode.<\/li>\n<li>Tabulate three\u00a0differences between the renal\u00a0artery and renal vein.\n<p style=\"text-align: center;\"><b>OR <\/b><\/p>\n<p>Which is the largest digestive gland in human body? What is its function?<\/li>\n<li>A convex lens can form a (i) real, inverted and magnified image as well as (ii) virtual, erect and magnified image of an object. If the focal length of the lens is 10 cm, what should be the range of the object distance in both cases? Draw ray diagrams to justify your answer.<br \/>\n<strong>Download myCBSEguide App for Comprehensive Exam Preparation<\/strong>Prepare effectively for your <strong>CBSE<\/strong>, <strong>NCERT<\/strong>, <strong>JEE (Main)<\/strong>, <strong>NEET-UG<\/strong>, and <strong>NDA<\/strong> exams with the <strong><a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide\">myCBSEguide<\/a> App<\/strong>. The app offers a wide array of study materials, including practice questions, sample papers, and model solutions, tailored to help you master your subjects and boost your exam scores.For educators, the <strong><a href=\"https:\/\/play.google.com\/store\/apps\/details?id=com.examin8.exam\">Examin8<\/a> App<\/strong> is an excellent tool to create custom exam papers with your own branding, such as your name and logo. Whether you&#8217;re a student or teacher, these apps are your go-to solutions for comprehensive exam preparation and evaluation. Unlock your full potential and boost your exam preparation by visiting the <a href=\"https:\/\/mycbseguide.com\/\"><strong>myCBSEguide<\/strong><\/a> and <a href=\"https:\/\/examin8.com\/\"><strong>Examin8<\/strong><\/a> websites today.The <strong>Class 10 Science Sample Papers 2025<\/strong> are the perfect resource to help you prepare thoroughly for your CBSE exams.<\/li>\n<li>How is ozone formed in the higher levels of the atmosphere? <strong>Damage to the ozone layer is a cause of concern.<\/strong> Justify this statement.\n<p style=\"text-align: center;\"><b>OR <\/b><\/p>\n<p>List two reasons to show that the existence of decomposers is essential in an ecosystem.<\/li>\n<li>Give reasons:\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>Red colour is selected for danger signals.<\/li>\n<li>The sky appears dark in space.<\/li>\n<li>The time difference between\u00a0actual sunset and apparent sunset is about 2 minutes.<\/li>\n<\/ol>\n<\/li>\n<li style=\"text-align: center; clear: both; display: block;\"><b>Section C<\/b><\/li>\n<li>P, Q and R are 3 elements which undergo chemical reactions according to the following equations:\n<ol style=\"list-style-type: lower-alpha;\" start=\"1\">\n<li>P<sub>2<\/sub>O<sub>3<\/sub> + 2Q\u00a0<span class=\"math-tex\">{tex}\\rightarrow{\/tex}<\/span>\u00a0Q<sub>2<\/sub>O<sub>3<\/sub> + 2P<\/li>\n<li>3RSO<sub>4<\/sub>\u00a0+ 2Q\u00a0<span class=\"math-tex\">{tex}\\rightarrow{\/tex}<\/span>\u00a0Q<sub>2<\/sub>(SO<sub>4<\/sub>)<sub>3 <\/sub>+ 3R<\/li>\n<li>3RO + 2P\u00a0<span class=\"math-tex\">{tex}\\rightarrow{\/tex}<\/span>\u00a0P<sub>2<\/sub>O<sub>3<\/sub> + 3R<br \/>\nAnswer the following questions:<\/p>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>Which element is most reactive?<\/li>\n<li>Which element is least reactive?<\/li>\n<li>State the type of reaction listed above.<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<\/li>\n<li>What is the cause of the inertness of noble gas elements?\n<p style=\"text-align: center;\"><b>OR <\/b><\/p>\n<p>Discuss the important properties of ionic compounds.<\/li>\n<li>A figure given below shows a diagram of a kidney and its associated structures. The table list the percentage of certain components found within the structures A and B.<br \/>\n<img decoding=\"async\" style=\"width: 180px; height: 120px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/imgur\/BKuHKpt.png\" alt=\"\" data-imgur-src=\"BKuHKpt.png\" \/><\/p>\n<table style=\"width: 100%;\" border=\"1\" cellspacing=\"0\" cellpadding=\"3\">\n<tbody>\n<tr>\n<td style=\"text-align: center;\" colspan=\"2\"><strong>In Structure A<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><strong>Components<\/strong><\/td>\n<td style=\"text-align: center;\"><strong>Concentration %<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Urea<\/td>\n<td style=\"text-align: center;\">0.03<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Glucose<\/td>\n<td style=\"text-align: center;\">0.10<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Amino acids<\/td>\n<td style=\"text-align: center;\">0.05<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Salts<\/td>\n<td style=\"text-align: center;\">0.75<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Proteins<\/td>\n<td style=\"text-align: center;\">8.00<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table style=\"width: 100%;\" border=\"1\" cellspacing=\"0\" cellpadding=\"3\">\n<tbody>\n<tr>\n<td style=\"text-align: center;\" colspan=\"2\"><strong>In Structure B<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><strong>Components<\/strong><\/td>\n<td style=\"text-align: center;\"><strong>Concentration %<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Urea<\/td>\n<td style=\"text-align: center;\">2.00<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Glucose<\/td>\n<td style=\"text-align: center;\">0.00<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Amino acids<\/td>\n<td style=\"text-align: center;\">0.00<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Salts<\/td>\n<td style=\"text-align: center;\">1.50<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Proteins<\/td>\n<td style=\"text-align: center;\">0.00<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>Using only the information given in the tables, deduce the functions of the kidney.<\/li>\n<li>Explain how the proportions of components present in part B would change if a person is suffering from diabetes mellitus.<\/li>\n<\/ol>\n<\/li>\n<li>In pea plant, round seed is dominant over the wrinkled. If a cross is carried out between these two plants, give answer to the following questions.\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>Mention the genes for the traits of parents.<\/li>\n<li>State the trait of F<sub>1<\/sub>\u00a0hybrids.<\/li>\n<li>Write the ratio of F<sub>2<\/sub> progeny obtained from this cross. What is the name of the cross?<\/li>\n<\/ol>\n<\/li>\n<li>&#8220;A concave mirror of focal length f can form a magnified, erect as well as an inverted image of an object placed in front of it.&#8221; Justify this statement stating the position of object with respect to the mirror in each case for obtaining these images.\n<ol style=\"list-style-type: lower-alpha;\" start=\"1\">\n<li>List the factors on which the resistance of a uniform cylindrical conductor of a given material depends.<\/li>\n<li>The resistance of a wire of 0.01 cm radius is 10<span class=\"math-tex\">{tex}\\Omega{\/tex}<\/span>. If the resistivity of the wire is 50 <span class=\"math-tex\">{tex}\\times{\/tex}<\/span> 10<sup>-8<\/sup> <span class=\"math-tex\">{tex}\\Omega{\/tex}<\/span>m, find the length of this wire.<\/li>\n<\/ol>\n<ol style=\"list-style-type: lower-alpha;\" start=\"1\">\n<li>Three resistors R<sub>1<\/sub>, R<sub>2<\/sub> and R<sub>3<\/sub> are connected in parallel and the combination is connected to a battery, an ammeter, a voltmeter and a key. Draw suitable circuit diagram to show the arrangement of these circuit components along with the direction of current flowing.<\/li>\n<li>Calculate the equivalent resistance of the following network:<br \/>\n<img decoding=\"async\" style=\"width: 350px; height: 105px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/question_images\/1678428696-xrupzm.jpg\" \/><\/li>\n<\/ol>\n<\/li>\n<li style=\"text-align: center; clear: both; display: block;\"><b>Section D<\/b>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li style=\"text-align: left;\">What is saponification? Differentiate between soaps and detergents on the basis of the following:\n<ol style=\"list-style-type: decimal;\" start=\"1\">\n<li style=\"text-align: left;\">Their chemical composition<\/li>\n<li>Their mechanism in hard water<\/li>\n<\/ol>\n<\/li>\n<li style=\"text-align: left;\">Explain the formation of micelles between oily dirt and soap molecules. Also draw its diagram.<\/li>\n<\/ol>\n<\/li>\n<li>\n<p style=\"text-align: center;\"><b>OR <\/b><\/p>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>A compound <strong>A<\/strong> with a molecular formula of C<sub>2<\/sub>H<sub>4<\/sub>O<sub>2<\/sub> reacts with a base to give salt and water. Identify A, state its nature and the name of the functional group it possesses. Write chemical equation for the reaction involved.<\/li>\n<li>When the above stated compound <strong>A<\/strong> reacts with another compound <strong>B<\/strong> having molecular formula C<sub>2<\/sub>H<sub>6<\/sub>O in the presence of an acid, a sweet smelling compound <strong>C<\/strong> is formed.\n<ol style=\"list-style-type: decimal;\" start=\"1\">\n<li>Identify <strong>B<\/strong> and <strong>C<\/strong>.<\/li>\n<li>State the role of acid in this reaction.<\/li>\n<li>Write chemical equation for the reaction involved.<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<ol style=\"list-style-type: lower-alpha;\" start=\"1\">\n<li>Although Amoeba and Leishmania, both show same mode of reproduction, but the process of reproduction is carried out in different ways.<br \/>\nIdentify their mode of reproduction and mention the way it is carried out in the two species.<\/li>\n<li>What is regeneration? Explain with the help of a diagram how this process is carried out in Planaria.<\/li>\n<li>Name the part of Rhizopus in which spores are formed.<br \/>\nState the condition under which spores grow into a new individual.<\/li>\n<\/ol>\n<\/li>\n<li>\n<p style=\"text-align: center;\"><b>OR <\/b><\/p>\n<p><img decoding=\"async\" style=\"width: 280px; height: 198px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/question_images\/1645676997-q9m8mu.jpg\" \/><br \/>\nObserve the above figure carefully and answer the following:<\/p>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>Which phenomenon does the figure represent?<\/li>\n<li>Which plant hormone is involved?<\/li>\n<li>How this plant hormone brings this movement?<\/li>\n<\/ol>\n<\/li>\n<li>A student wants to project the image of a candle flame on the walls of school laboratory by using a lens.\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>Which type of lens should he use and why?<\/li>\n<li>At what distance in terms of focal length F of the lens should he place the candle flame, so as to get\n<ol style=\"list-style-type: lower-alpha;\" start=\"1\">\n<li>a magnified and<\/li>\n<li>a diminished image respectively, on the wall?<\/li>\n<\/ol>\n<\/li>\n<li>Draw ray diagrams to show the formation of the image in each case.<\/li>\n<\/ol>\n<p style=\"text-align: center;\"><b>OR <\/b><\/p>\n<ol style=\"list-style-type: lower-alpha;\" start=\"1\">\n<li>With the help of diagram explain Isaac Newton\u2019s experiment that led to the idea that the sunlight is made up of seven colours.<\/li>\n<li>What is atmospheric refraction? List two natural phenomena based on atmospheric refraction.<\/li>\n<\/ol>\n<\/li>\n<li style=\"text-align: center; clear: both; display: block;\"><b>Section E<\/b><\/li>\n<li><strong>Read the following text carefully and answer the questions that follow:<\/strong><br \/>\nSalt of a strong acid and strong base is neutral with a pH value of 7. NaCl common salt is formed by a combination of hydrochloride and sodium hydroxide solution. This is the salt that is used in food. Some salt is called rock salt, bed of rock salt was formed when seas of bygone ages dried up.\u00a0The common salt thus obtained is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda, and bleaching\u00a0powder.<\/p>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>If given acids are phosphoric acid, carbonic acid, hydrochloric acid\u00a0and sulphuric acid, then which acid\u00a0does not form an acidic salt? (1)<\/li>\n<li>What is the formula of baking soda? (1)<\/li>\n<li>Name the substance which on treatment with chlorine to obtain bleaching powder. (2)<br \/>\n<strong>OR<\/strong><br \/>\nWhich salt is used for removing the permanent hardness of water? (2)<\/li>\n<\/ol>\n<\/li>\n<li><strong>Read the following text carefully and answer the questions that follow:<\/strong><br \/>\nEnvironmental triggers such as light, or gravity will change the directions that plant parts grow in. These directional, or tropic, movements can be either towards the stimulus or away from it. So, in two different kinds of phototropic movement, shoots respond by bending towards light while roots respond by bending away from it. How does this help the plant? Plants show tropism in response to other stimuli as well. The roots of a plant always grow downwards while the shoots usually grow upwards and away from the earth. This upward and downward growth of shoots and roots, respectively, in response to the pull of earth or gravity, is, obviously, geotropism. If \u2018hydro\u2019 means water and \u2018chemo\u2019 refers to chemicals, what would \u2018hydrotropism\u2019 and \u2018chemotropism\u2019 mean? Can we think of examples of these kinds of directional growth movements? One example of chemotropism is the growth of pollen tubes towards ovules, about which we will learn more when we examine the reproductive processes of living organisms.<br \/>\n<img decoding=\"async\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/imgur\/JOt1rbQ.png\" alt=\"\" \/><\/p>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>Where does negative phototropism occur in plants? (1)<\/li>\n<li>Phototropism in shoots is attributed due to which plant hormone? (1)<\/li>\n<li>Tendrils exhibit\/ twining of tendrils show which type of tropic movement? (2)<br \/>\n<strong>OR<\/strong><br \/>\nIf the stem grows towards sunlight and the root grows just opposite to it, then what type of movement of the stem is it? (2)<\/li>\n<\/ol>\n<\/li>\n<li><strong>Read the following text carefully and answer the questions that follow:<\/strong><br \/>\nA magnetic field is described by drawing the magnetic field lines. When a small north magnetic pole is placed in the magnetic field created by a magnet, it will experience a force. And if the north pole is free, it will move under the influence of the magnetic field. The path traced by a north magnetic pole free to move under the influence of a magnetic field is called a magnetic field line.<br \/>\n<img decoding=\"async\" style=\"height: 176px; width: 100px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/question_images\/1642663720-8xj9f6.jpg\" \/><br \/>\nSince the direction of the magnetic field line is the direction of the force on a north pole, so the magnetic field lines always begin from the N-pole of a magnet and end on the S-pole of the magnet. Inside the magnet, however, the direction of magnetic field lines is from the S-pole of the magnet to the N-pole of the magnet. Thus, the magnetic field lines are closed curves. When a small compass is moved along a magnetic field line, the compass needle always sets itself along the line tangential to it. So, a line drawn from the south pole of the compass needle to its north pole indicates the direction of the magnetic field at that point.<\/p>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>The figure shows the magnetic field lines in a magnetic field. A, B., and C are three points in this field. At what point is the magnetic field strength? (1)<br \/>\n<img decoding=\"async\" style=\"height: 100px; width: 150px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/imgur\/1663860148-x4pnpq.jpg\" alt=\"\" \/><\/li>\n<li>Do the magnetic field lines intersect? if not why? (1)<\/li>\n<li>A strong bar magnet is placed vertically above a horizontal wooden board. What would be the magnetic lines of force? (2)<br \/>\n<strong>OR<\/strong><br \/>\nDraw the pattern of magnetic field lines for a bar magnet. (2)<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<p style=\"text-align: center; page-break-before: always;\"><strong>Class 10 &#8211; Science<br \/>\nSample Paper &#8211; 01 (2024-25)<\/strong><\/p>\n<hr \/>\n<h2 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"Solution\"><\/span><strong>Solution <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol style=\"padding-left: 20px;\">\n<li style=\"text-align: center; display: block;\"><b>Section A <\/b><\/li>\n<li>(a) Zinc oxide<br \/>\n<b>Explanation: <\/b> Zinc oxide<\/li>\n<li>(b) A and B<br \/>\n<b>Explanation: <\/b> CaO(s) + H<sub>2<\/sub>O(l)\u00a0<span class=\"math-tex\">{tex}\\rightarrow{\/tex}<\/span>\u00a0Ca(OH)<sub>2<\/sub> (aq)<br \/>\nA combination reaction is a reaction where two or more elements or compounds combine to form a single compound.<br \/>\nCalcium oxide combines with water to form calcium hydroxide. Hence, it is a combination reaction.<br \/>\nIt is an exothermic reaction as a lot of heat liberate with hissing sound during the reaction.<\/li>\n<li>(a) Sodium hydrogen carbonate and tartaric acid<br \/>\n<b>Explanation: <\/b> Baking soda is a mixture of sodium hydrogen carbonate (NaHCO<sub>3<\/sub>) and a mild edible tartaric acid.<\/li>\n<li>(a) A and C are isomers of hexane and B is benzene.<br \/>\n<b>Explanation: <\/b> A and C are isomers of hexane and B is benzene.<\/li>\n<li>(c) Lead<br \/>\n<b>Explanation: <\/b> Lead<\/li>\n<li>(c) II and III<br \/>\n<b>Explanation: <\/b> II and III<\/li>\n<li>(c) (i) and (ii)<br \/>\n<b>Explanation: <\/b> (i)\u00a0n\u2212butane\u00a0and \u00a0(ii)\u00a0iso\u2212butane\u00a0are structural isomer of butane.<br \/>\n(iii) and (iv) are cycloalkanes that\u00a0have different molecular formulas and therefore, these are not isomers of butane.<\/li>\n<li>(c) IV<br \/>\n<b>Explanation: <\/b> IV<\/li>\n<li>(d) 1 : 1<br \/>\n<b>Explanation: <\/b> A cross between (TT) and (tt) would produce progenies with following genotypes-<br \/>\nIn F<sub>2<\/sub> generation &#8211; selfing of F<sub>1<\/sub> progeny-<\/p>\n<table style=\"width: 100%;\" border=\"1\" cellspacing=\"0\" cellpadding=\"3\">\n<tbody>\n<tr>\n<td style=\"text-align: center;\">Gametes Tt<\/td>\n<td style=\"text-align: center;\">T<\/td>\n<td style=\"text-align: center;\">t<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">T<\/td>\n<td style=\"text-align: center;\">TT<\/td>\n<td style=\"text-align: center;\">Tt<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">t<\/td>\n<td style=\"text-align: center;\">Tt<\/td>\n<td style=\"text-align: center;\">tt<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Pure tall (TT), Mixed tall (Tt) and Short (tt). The ratio of pure tall and pure short plant is 1 : 1.<\/p>\n<p><strong>Enhance Your Exam Preparation with the myCBSEguide App<\/strong><\/p>\n<p>Looking to excel in your exams? Download the <a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide\"><strong>myCBSEguide App<\/strong><\/a> for access to comprehensive study material for <strong>CBSE<\/strong>, <strong>NCERT<\/strong>, <strong>JEE (Main)<\/strong>, <strong>NEET-UG<\/strong>, and <strong>NDA<\/strong> exams. With a wide range of practice questions, sample papers, and detailed solutions, the app is designed to help students prepare effectively and score high.<\/p>\n<p>For educators, the <a href=\"https:\/\/play.google.com\/store\/apps\/details?id=com.examin8.exam\"><strong>Examin8 App<\/strong><\/a> is an excellent tool to create custom question papers featuring your own name, logo, and branding, making the assessment process more personalized and efficient.<\/p>\n<p>Visit the <a href=\"https:\/\/mycbseguide.com\/\"><strong>myCBSEguide<\/strong><\/a> and <a href=\"https:\/\/examin8.com\/\"><strong>Examin8<\/strong><\/a> websites today to streamline your study sessions and enhance your learning experience.<\/li>\n<li>(c) false feet developed in some unicellular organisms.<br \/>\n<b>Explanation: <\/b> false feet developed in some unicellular organisms.<\/li>\n<li>(b) girl<br \/>\n<b>Explanation: <\/b> A zygote which has an X-chromosome inherited from the father will develop into a girl child.<\/li>\n<li>(d) Valves ensure that the blood does not flow backwards.<br \/>\n<b>Explanation: <\/b><\/p>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>The human circulatory system consists of many systems that are associated with each other.<\/li>\n<li>These systems are arteries, veins, heart, and vessels. There are further two types of vessels which are known as coronary vessel and portal vessel.<\/li>\n<li>The human circulatory system regulates the flow of blood in the body.<\/li>\n<li>Blood flows from the heart to lungs and then back to heat in a cycle.<\/li>\n<\/ol>\n<\/li>\n<li>(c) <img decoding=\"async\" style=\"height: 135px; width: 150px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/question_images\/1692272179-upy7r3.jpg\" \/><br \/>\n<b>Explanation: <\/b> Magnetic field lines enter from the south pole and exit from the north pole. A circular coil that conducts current has curved lines, a straight line running through the centre, and concentric circles at the coil&#8217;s two opposite ends.<\/li>\n<li>(a) 1 A<br \/>\n<b>Explanation: <\/b> In a series connection, the current through each device remains the same. Therefore, the current through the 40 W\u00a0bulb will also be 1 A.<\/li>\n<li>(a) \u00a0Chlorofluorocarbons<br \/>\n<b>Explanation: <\/b> Ozone layer is damaged by\u00a0CFCs.\u00a0The decrease in the\u00a0amount of ozone in the atmosphere has been linked to synthetic chemicals\u00a0like\u00a0chlorofluorocarbons (CFCs) which are used as refrigerants and in fire\u00a0extinguishers.<\/li>\n<li>(a) 5000 KJ<br \/>\n<b>Explanation: <\/b> According to 10%\u00a0law, the energy available to each successive trophic level is 10%\u00a0of the previous trophic level.<br \/>\nGiven, the energy available at the\u00a0third trophic level =\u00a050 KJ<br \/>\nThe energy available at\u00a0second trophic level = 50 KJ <span class=\"math-tex\">{tex}\\times{\/tex}<\/span> 10 = 500\u00a0KJ<br \/>\nTherefore, the energy available at the producer level (first trophic level)\u00a0=\u00a0500\u00a0KJ <span class=\"math-tex\">{tex}\\times{\/tex}<\/span> 10 = 5000 KJ<\/li>\n<li>(b) Both A and R are true but R is not the correct explanation of A.<br \/>\n<b>Explanation: <\/b> Both A and R are true but R is not the correct explanation of A.<\/li>\n<li>(c) A is true but R is false.<br \/>\n<b>Explanation: <\/b> Grafting is a method in which the cut stems of two different plants (one with roots and other without roots) are joined together in such a way that the two stems join and grow as a single plant. Stock is the lower part of a plant (or tree) having the roots. Scion is the upper part of a plant which may have leaves on it (but no roots).<\/li>\n<li>(b) Both A and R are true but R is not the correct explanation of A.<br \/>\n<b>Explanation: <\/b> The metallic body of the electrical appliance is connected to the third pin which is connected to the earth. This is a safety precaution and avoids eventual electric shock. By doing this the extra charge flowing through the metallic body is passed to earth and avoid shocks. There is nothing such as reducing the heating of connecting wires by three-pin connections.<\/li>\n<li>(a) Both A and R are true and R is the correct explanation of A.<br \/>\n<b>Explanation: <\/b> Both A and R are true and R is the correct explanation of A.<\/li>\n<li style=\"text-align: center; display: block;\"><b>Section B <\/b>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li style=\"text-align: left;\">This is a double displacement reaction. Here main product Sodium ethanoate is formed.<br \/>\nCH<sub>3<\/sub>COOH + NaOH\u00a0<span class=\"math-tex\">{tex}\\rightarrow{\/tex}<\/span>\u00a0CH<sub>3<\/sub>COONa + H<sub>2<\/sub>O<\/li>\n<li style=\"text-align: left;\">This is a combustion reaction. Here main product Carbondioxide is formed.<br \/>\n2C<sub>2<\/sub>H<sub>5<\/sub>OH + 6O<sub>2<\/sub>\u00a0<span class=\"math-tex\">{tex}\\rightarrow{\/tex}<\/span> 4CO<sub>2<\/sub> + 6H<sub>2<\/sub>O + Heat + Light<\/li>\n<\/ol>\n<ul>\n<li style=\"text-align: left;\">The process of reproduction observed in yeast is called budding or budding yeast reproduction. In this process, a small bud forms on the parent yeast cell, which eventually grows in size and detaches to become a new, genetically identical yeast cell.<\/li>\n<li>Activity-\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li style=\"text-align: left;\">Dissolve sugar in water<\/li>\n<li style=\"text-align: left;\">Add yeast to it and keep it in a warm place<\/li>\n<li style=\"text-align: left;\">After 2 hours, put a drop of yeast culture on a slide and observe under microscope<\/li>\n<\/ol>\n<\/li>\n<li style=\"text-align: left;\">Hydra<\/li>\n<\/ul>\n<\/li>\n<li style=\"clear: both;\">\n<table style=\"width: 100%;\" border=\"1\" cellspacing=\"0\" cellpadding=\"3\">\n<tbody>\n<tr>\n<td style=\"text-align: center;\"><strong>Renal artery<\/strong><\/td>\n<td style=\"text-align: center;\"><strong>Renal vein<\/strong><\/td>\n<\/tr>\n<tr>\n<td>The renal artery is thick, muscular and strong possessing a narrow lumen with no valves.<\/td>\n<td>The renal vein is thinner and posses a wide lumen with valves to prevent backflow of blood.<\/td>\n<\/tr>\n<tr>\n<td>It carries oxygenated blood from the heart to the kidneys.<\/td>\n<td>It carries deoxygenated blood from the kidneys back to the heart.<\/td>\n<\/tr>\n<tr>\n<td>Blood flows with high pressure.<\/td>\n<td>Blood flows with low pressure.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: center;\"><b>OR <\/b><\/p>\n<p>The Largest digestive gland in human body is liver. Its most important function is to secrete bile juice which does not contain any enzyme but certain salts. Bile carry out emulsification of fats.<\/li>\n<li>A convex lens can form a (i) real, inverted and magnified image as well as (ii) virtual, erect and magnified image of an object<br \/>\n<img decoding=\"async\" style=\"height: 92px; width: 300px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/question_images\/1699354348-8qpb34.jpg\" \/><br \/>\n<strong>Boost Your Exam Preparation with the myCBSEguide App<\/strong>For thorough exam practice and effective preparation, download the <a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide\"><strong>myCBSEguide App<\/strong><\/a>. This app offers comprehensive study resources for <strong>CBSE<\/strong>, <strong>NCERT<\/strong>, <strong>JEE (Main)<\/strong>, <strong>NEET-UG<\/strong>, and <strong>NDA<\/strong> exams. Access a wide range of practice questions, sample papers, and detailed solutions to help you master key concepts and perform well in exams. These sample papers are designed to help students understand the <strong>exam pattern<\/strong> and <strong>mark distribution<\/strong> for the 2025 board exams. By solving the <strong>Class 10 Science Sample Papers 2025<\/strong>, you\u2019ll familiarize yourself with the types of questions asked, including <strong>competency-based questions<\/strong> and <strong>case study questions<\/strong>.For educators, the <a href=\"https:\/\/play.google.com\/store\/apps\/details?id=com.examin8.exam\"><strong>Examin8 App<\/strong><\/a> provides the perfect platform to create customized exam papers with your own branding, including your name and logo. It&#8217;s an ideal tool for teachers to design personalized assessments.Visit the <a href=\"https:\/\/mycbseguide.com\/\"><strong>myCBSEguide<\/strong><\/a> websites and <a href=\"https:\/\/examin8.com\/\"><strong>Examin8<\/strong><\/a> websites today to elevate your exam preparation and teaching experience.<\/li>\n<li style=\"clear: both;\">Ozone is formed in upper atmosphere by the reaction of ultraviolet UV radiations on oxygen O<sub>2<\/sub> molecule. The damage to ozone layer is a cause of concern to us as due to its damage more ultraviolet rays reach the earth&#8217;s surface causing various health hazards.\n<p style=\"text-align: center;\"><b>OR <\/b><\/p>\n<p>Microorganisms like bacteria and fungi which helps in the breakdown of organic matter or biomass of dead plants and animals into simple inorganic raw materials and replenish the environment\u00a0are termed as decomposers. Their existence is thus, essential in an ecosystem because<\/p>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>They help in the natural replenishment of soil.<\/li>\n<li>They help in keeping the environment clean as they reduce environmental pollution.<\/li>\n<\/ol>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>Danger signals are red in color because it is scattered the least by air molecules. The effect of scattering is inversely related to the fourth power of the wavelength of a color. Since\u00a0the color red has the highest wavelength of all the colors we can see it scattered the least. So, red light is used as a danger signal as it is able to travel the longest distance through the fog, rain, etc.<\/li>\n<li>In outer\u00a0space,\u00a0the sky appears dark\u00a0instead of blue to an astronaut because there\u00a0is\u00a0no atmosphere containing air in outer\u00a0space\u00a0to scatter sunlight. Since there\u00a0is\u00a0no scattered light to reach our eyes in outer\u00a0space,\u00a0the sky appears\u00a0to be\u00a0dark\u00a0there.<\/li>\n<li>Due to atmospheric refraction, the sun is visible two\u00a0minutes\u00a0after the actual sunset. Thus,\u00a0the time difference between the actual sunset and apparent sunset\u00a0is\u00a02 minutes.<\/li>\n<\/ol>\n<\/li>\n<li style=\"text-align: center; display: block;\"><b>Section C <\/b>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li style=\"text-align: left;\">Q is the most reactive metal out of P, R\u00a0and Q as it has replaced both P and R from their compounds.<\/li>\n<li style=\"text-align: left;\">R is the least reactive element as it has been displaced\u00a0by both P and Q.<\/li>\n<li style=\"text-align: left;\">The type of reaction is Displacement reaction.<\/li>\n<\/ol>\n<\/li>\n<li style=\"clear: both;\">The inertness or reluctance of the members of the noble gas family is linked with their structure. The first member helium (He) has two electrons in the only shell which is the K-shell. The atoms of all other members have eight electrons in their outermost shell, also called valence shell. The electronic configuration of the members of the family are as follows:<br \/>\n<table border=\"1\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td style=\"width: 58.1pt;\">Noble gas<br \/>\nelement<\/td>\n<td style=\"width: 46.95pt;\">Symbol<\/td>\n<td style=\"width: 50.35pt;\">Atomic<br \/>\nNo. (Z)<\/td>\n<td style=\"width: 85.8pt;\">Electronic<br \/>\nConfiguration<\/td>\n<td style=\"width: 87.5pt;\">No. of electrons<br \/>\nin outermost shell<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 58.1pt;\">Helium<\/td>\n<td style=\"width: 46.95pt;\">He<\/td>\n<td style=\"width: 50.35pt;\">2<\/td>\n<td style=\"width: 85.8pt;\">2<\/td>\n<td style=\"width: 87.5pt;\">2<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 58.1pt;\">Neon<\/td>\n<td style=\"width: 46.95pt;\">Ne<\/td>\n<td style=\"width: 50.35pt;\">10<\/td>\n<td style=\"width: 85.8pt;\">2, 8<\/td>\n<td style=\"width: 87.5pt;\">8<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 58.1pt;\">Argon<\/td>\n<td style=\"width: 46.95pt;\">Ar<\/td>\n<td style=\"width: 50.35pt;\">18<\/td>\n<td style=\"width: 85.8pt;\">2, 8, 8<\/td>\n<td style=\"width: 87.5pt;\">8<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 58.1pt;\">Krypton<\/td>\n<td style=\"width: 46.95pt;\">Kr<\/td>\n<td style=\"width: 50.35pt;\">36<\/td>\n<td style=\"width: 85.8pt;\">2, 8, 18, 8<\/td>\n<td style=\"width: 87.5pt;\">8<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 58.1pt;\">Xenon<\/td>\n<td style=\"width: 46.95pt;\">Xe<\/td>\n<td style=\"width: 50.35pt;\">54<\/td>\n<td style=\"width: 85.8pt;\">2, 8, 18, 18, 8<\/td>\n<td style=\"width: 87.5pt;\">8<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 58.1pt;\">Radon<\/td>\n<td style=\"width: 46.95pt;\">Rn<\/td>\n<td style=\"width: 50.35pt;\">86<\/td>\n<td style=\"width: 85.8pt;\">2, 8, 18, 32, 18, 8<\/td>\n<td style=\"width: 87.5pt;\">8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>This is the maximum number of electrons which the atoms of these elements can have in their outermost shell. They have, therefore, no tendency to either lose or gain one or more electrons. In other words, these atoms are fully satisfied. The members of the family are called inert gases or noble gases.<\/p>\n<p style=\"text-align: center;\"><b>OR <\/b><\/p>\n<p>Important properties of ionic compounds.<br \/>\nThe important properties of the ionic or electrovalent compounds are given below:<\/p>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>Ionic compounds consist of ions. The ionic compounds consist of positive ions or cations and negative ions or anions. These ions are attracted towards each other by force of attraction called electrostatic force of attraction.<\/li>\n<li>Ionic compounds are crystalline solids. The ionic compounds exist as solids. These solids are in the form of crystals. The crystals are formed by the combination of a large number of cations and anions. For example, sodium chloride is made up by Na<sup>+<\/sup> and Cl<sup>&#8211; <\/sup>ions. The arrangement of ions in the crystals is called crystal lattice. The crystal lattice is different for different ionic compounds. The arrangement of Na<sup>+<\/sup> and Cl<sup>&#8211;<\/sup> ions in the crystal lattice of NaCl is as shown.<br \/>\n<img decoding=\"async\" style=\"width: 200px; height: 160px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/quesbank\/10\/sc\/ch03\/image015.png\" \/><\/li>\n<li>Ionic compound have high melting and boiling points. We know that the ionic compounds are solids in which a large number of cations and anions are closely packed in space. If these compounds are to melt or boil, the ions are to be separated from each other. For the separation of ions, energy is needed.<br \/>\nTherefore, ionic compounds have high melting and boiling points.<\/li>\n<li>Ionic compounds do not conduct electricity in the solid state. In ionic compounds, the current is to be carried by the movement of cations and anions. As these are closely packed in the crystalline solids, their movement is almost nil. Since the ions are not in a position to move, the ionic compounds conduct electricity.<\/li>\n<li>Ionic compounds conduct electricity in molten state or in solution. When heated the ionic compounds melt. Similarly, when added to a solvent like water, they dissolve. In molten state or in solution, the cations and anions are free to move. Because of the movement of the ions, these compounds conduct electricity.<\/li>\n<li>Ionic compounds are generally soluble in water. When an ionic compound is added to water, the force which binds the ions with one another becomes weak. Therefore, these oppositely charged ions get separated and dissolve in water.<\/li>\n<li>Ionic compounds have high densities.<\/li>\n<li>Ionic compounds are hard and brittle.<\/li>\n<li>Ionic compounds undergo ionic reactions which are quick and proceed to completion.<\/li>\n<\/ol>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>The urea content is higher in structure B, whereas the concentration of useful components such as glucose is low. This shows that the kidney performs the function of filtration. It filters out useful substances, e.g. glucose, amino acids into the blood, while throwing out nitrogenous waste, e.g. urea and urine.<\/li>\n<li>There would be glucose in B as without insulin, blood glucose would not be converted to glycogen for storage. The kidney attempts to reduce the blood glucose level by excreting it in urine.The glucose in digested food is absorbed by the intestinal cells into the bloodstream, and is carried by blood to all the cells in the body. However, glucose cannot enter the cells alone. It needs assistance from insulin to penetrate the cell walls<\/li>\n<\/ol>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>RR for homozygous pure round. And rr for homozygous pure wrinkle pea plant.<\/li>\n<li>Rr (hybrid) &#8211; heterozygous. All are round since round is dominant over wrinkled.<\/li>\n<li>3:1 (phenotypic ratio), 1:2:1 (genotypic ratio) The name of this cross is monohybrid cross.<\/li>\n<\/ol>\n<\/li>\n<li>When an object is placed between Focus and Pole of concave mirror, the image formed is virtual, magnified, erect and behind the mirror.when an object is placed between\u00a0Curvature and Focus of concave mirror, the image formed is real, magnified,\u00a0inverted at the same side of mirror.\n<ol style=\"list-style-type: lower-alpha;\" start=\"1\">\n<li>(i) Length of the conductor (l)<br \/>\n(ii) Area of cross-section of the conductor (A)<\/li>\n<li>Radius of wire, r = 0.01 cm = 0.01 <span class=\"math-tex\">{tex}\\times{\/tex}<\/span> 10<sup>-2<\/sup> m<br \/>\nResistance, R = 10 <span class=\"math-tex\">{tex}\\Omega{\/tex}<\/span><br \/>\nResistivity, <span class=\"math-tex\">{tex}\\rho{\/tex}<\/span> = 50 <span class=\"math-tex\">{tex}\\times{\/tex}<\/span> 10<sup>-8<\/sup> <span class=\"math-tex\">{tex}\\Omega{\/tex}<\/span>m<br \/>\n<span class=\"math-tex\">{tex}R=\\rho \\frac{l}{A}=\\rho \\frac{l}{\\pi r^2} \\Rightarrow l=\\frac{R \\pi r^2}{\\rho}{\/tex}<\/span><br \/>\n<span class=\"math-tex\">{tex}l=\\frac{10 \\Omega \\times 22 \\times\\left(0 \\cdot 01 \\times 10^{-2}\\right)^2 \\mathrm{~m}}{7 \\times 50 \\times 10^{-8} \\Omega \\mathrm{m}}{\/tex}<\/span><br \/>\n<span class=\"math-tex\">{tex}=\\frac{22}{35} \\mathrm{~m}{\/tex}<\/span> = 0.629 m = 0.628 m = 0.62 m<\/li>\n<\/ol>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li><img decoding=\"async\" style=\"width: 150px; height: 252px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/question_images\/1679915723-cne8zk.jpg\" \/><\/li>\n<li><img decoding=\"async\" style=\"width: 300px; height: 181px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/question_images\/1679916572-qh5p5m.jpg\" \/><br \/>\nHence, the equivalent Resistance of above network is 15<span class=\"math-tex\">{tex}\\Omega{\/tex}<\/span><\/li>\n<\/ol>\n<\/li>\n<li style=\"text-align: center; display: block;\"><b>Section D <\/b>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li style=\"text-align: left;\">Saponification is the hydrolysis of an ester to form an alcohol and the salt of a carboxylic acid in acidic or essential conditions.<br \/>\n<table style=\"width: 100%;\" border=\"1\" cellspacing=\"0\" cellpadding=\"3\">\n<tbody>\n<tr>\n<td style=\"text-align: center;\"><\/td>\n<td style=\"text-align: center;\"><strong>Soap<\/strong><\/td>\n<td style=\"text-align: center;\"><strong>Detergent<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Chemical composition<\/td>\n<td>Soaps are sodium salts of long chain fatty acids<\/td>\n<td>detergents are sodium salts of alkyl benzene sulphonic acids.<\/td>\n<\/tr>\n<tr>\n<td>mechanism in hard water<\/td>\n<td>Soaps form scum in hard water.<\/td>\n<td>Detergents do not form any scum.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n<li style=\"text-align: left;\">Soap molecule has two ends, the charged end that gets attracted towards water is called hydrophilic and the long carbon chain that repels water is called hydrophobic end. When soap is dissolved in water, the carbon chain i.e, hydrophobic end gets attracted towards the oil, dirt and grease. The hydrophilic end which is attracted by water molecules points outwards thus, the micelle formation takes place.<br \/>\nThe tail entangles dirt, oil or grease, if required the agitation is done. Lot of rinsing is done with water so that water molecules attract charged end and carries the soap molecules with to it attached to it and clean the clothes, utensils, etc.<br \/>\n<img decoding=\"async\" style=\"height: 161px; width: 200px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/question_images\/1699357201-ye9qqf.jpg\" \/><\/li>\n<\/ol>\n<\/li>\n<li style=\"clear: both;\">\n<p style=\"text-align: center;\"><b>OR <\/b><\/p>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>Since acid and base react to form salt and water, compound A will naturally be acidic due to the presence of a carboxylic acid group.<br \/>\nChemical equation for acid and base reaction:<br \/>\nAcid + Base <span class=\"math-tex\">{tex}\\to{\/tex}<\/span> Salt + Water<br \/>\nHX + MOH <span class=\"math-tex\">{tex}\\to{\/tex}<\/span> MX + HOH<br \/>\nCH<sub>3<\/sub>COOH<sub>(aq)<\/sub> + NaOH<sub>(aq)<\/sub> <span class=\"math-tex\">{tex}\\to{\/tex}<\/span> CH<sub>3<\/sub>COONa<sub>(aq)<\/sub> + H<sub>2<\/sub>O(l)<br \/>\nThus, Compound A is CH<sub>3<\/sub>COOH as it is acidic in nature containing a carboxyl(COOH) functional group.<\/li>\n<li>In a process known as Fischer esterification, carboxylic acids combine with alcohols to create esters. An acid catalyst is required, and alcohol serves as a reaction solvent.\n<ol style=\"list-style-type: upper-roman;\" start=\"1\">\n<li>Compound B is Ethanol and compound\u00a0C is Ethyl acetate.<\/li>\n<li>HCl act as catalyst in this reaction.<\/li>\n<li>A sweet-smelling compound formed by reacting acetic acid with ethanol in the presence of hydrochloric acid is ethyl acetate. Chemical equation for the reaction is as follows:<br \/>\n<span class=\"math-tex\">{tex}{\\mathrm{CH}}_3\\;-\\;\\underset{\\underset{\\mathrm O}{\\vert\\vert}}{\\mathrm C}\\;-\\;\\mathrm{OH}\\;+\\;{\\mathrm{HOC}}_2{\\mathrm H}_5\\;\\xrightarrow{\\mathrm H^+}\\;{\\mathrm{CH}}_3\\;\\underset{\\mathrm{Ethyl}\\;\\mathrm{acetate}}{-\\;\\underset{\\underset{\\mathrm O}{\\vert\\vert}}{\\mathrm C}\\;-}\\;{\\mathrm{OC}}_2{\\mathrm H}_5{\/tex}<\/span><\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<ol style=\"list-style-type: lower-alpha;\" start=\"1\">\n<li>Mode of asexual reproduction in Amoeba and Leishmania is Binary Fission.<br \/>\nIn Amoeba, during division splitting of the two cells can take place in any plane.<br \/>\nIn Leishmania, binary fission occurs in a definite orientation about the whip like structures present at one end of the cell.<\/li>\n<li>Regeneration is a process in which an organism is broken\/ cut into pieces, these pieces may grow into separate individuals<br \/>\nDiagram:<br \/>\n<img decoding=\"async\" style=\"height: 182px; width: 158px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/question_images\/1722501374-pk3gdf.jpg\" \/><\/li>\n<li>Spores are formed in Sporangia.<br \/>\nSpores grow into a new individual under moist conditions.<\/li>\n<\/ol>\n<\/li>\n<li style=\"clear: both;\">\n<p style=\"text-align: center;\"><b>OR <\/b><\/p>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>The figure represents the phenomenon of phototropism i.e., response of plants to light.<\/li>\n<li>The plant hormone auxin is invoved in the phenomenon of phototropism.<\/li>\n<li>Plants show their growth towards light and this movement is caused by the action of auxin hormone. Auxin is synthesised by the meristematic tissue which is present at the tip of shoot, roots etc. In the above figure the plant bends towards the light. Auxin hormone is synthesised in the tip of the stem and moves towards the side of the plant not receiving light. Due to more auxin hormone in the region of the plant that does not receive light they grew faster than the part that receives light. So the stem bents towards the direction of light.<\/li>\n<\/ol>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>He should use a convex lens as real images are formed by a convex lens,\u00a0when objects are placed between the focus and infinity .<\/li>\n<li>\n<ol style=\"list-style-type: lower-alpha;\" start=\"1\">\n<li>For magnified image candle should be placed between\u00a0focus (F) and centre of curvature (2F) of lens.<\/li>\n<li>To get diminished image candle should be placed beyond centre of curvature (2F) of lens.<\/li>\n<\/ol>\n<\/li>\n<li>\n<ol style=\"list-style-type: lower-alpha;\" start=\"1\">\n<li>For magnified image,(object between F and 2F).<br \/>\n<img decoding=\"async\" style=\"width: 179px; height: 104px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/imgur\/37T6jQb.png\" alt=\"\" data-imgur-src=\"37T6jQb.png\" \/><\/li>\n<li>For diminished image,(object beyond 2F ).<br \/>\n<img decoding=\"async\" style=\"width: 241px; height: 101px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/imgur\/dJEeJEx.png\" alt=\"\" data-imgur-src=\"dJEeJEx.png\" \/><\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<\/li>\n<li style=\"clear: both;\">\n<p style=\"text-align: center;\"><b>OR <\/b><\/p>\n<ol style=\"list-style-type: lower-alpha;\" start=\"1\">\n<li>Issac Newton was the first to use a glass prism to obtain the spectrum of white light. He tried to split various colours of the spectrum of white light by using another similar prism, he could not get any more colours. Thus he proved that sunlight is made of seven colours.<br \/>\n<img decoding=\"async\" style=\"height: 122px; width: 240px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/question_images\/1722504391-hmpeur.jpg\" \/><\/li>\n<li>Atmospheric Refraction: It is the refraction of light by the earth\u2019s atmospheric layers having varying refractive indices.<br \/>\nTwo natural phenomena:<\/p>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li>Twinkling of stars,<\/li>\n<li>\u00a0Advanced sunrise and delayed sunset<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<\/li>\n<li style=\"text-align: center; display: block;\"><b>Section E <\/b>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li style=\"text-align: left;\">Carbonic acid does not form an acidic salt.<\/li>\n<li style=\"text-align: left;\">Sodium bicarbonate, commonly known as baking soda or bicarbonate of soda, is a chemical compound with the formula\u00a0NaHCO<sub>3<\/sub>.<\/li>\n<li style=\"text-align: left;\">Ca(OH)<sub>2\u00a0<\/sub>treatment with chlorine to obtain bleaching powder.<br \/>\n<strong>OR<\/strong><br \/>\nCa(OH)<sub>2<\/sub> + Cl<sub>2<\/sub> <span class=\"math-tex\">{tex}\\longrightarrow{\/tex}<\/span> CaOCl<sub>2<\/sub> + H<sub>2<\/sub>O<br \/>\nWashing soda\u00a0is used for removing the permanent hardness of the water.<\/li>\n<\/ol>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li style=\"text-align: left;\">In plants,\u00a0negative phototropism occurs in roots.<\/li>\n<li style=\"text-align: left;\">Phototropism in shoots is attributed due to auxin in plants.<\/li>\n<li style=\"text-align: left;\">Tendrils exhibit\/ twining of tendrils show thigmotropism movement.<br \/>\n<strong>OR<\/strong><br \/>\nPositive phototropic movement.<\/li>\n<\/ol>\n<ol style=\"list-style-type: lower-roman;\" start=\"1\">\n<li style=\"text-align: left;\">No two magnetic field lines are found to cross each other. If two field lines crossed each other, it would mean that at the point of intersection, the compass needle would point in two directions at the same time, which is not possible.<\/li>\n<li style=\"text-align: left;\">The magnetic field and hence the magnetic line of force exist in all the planes all around the magnet.<\/li>\n<li style=\"text-align: left;\">The magnetic lines of force are uniform and strong at point C and they diverge as they move towards points A and B and the distance between the lines increases. Eventually, the strength of the magnetic field is strong where the lines are closer and they weaken as the closeness decreases i.e., at point C.<br \/>\n<strong>OR<\/strong><br \/>\n<img decoding=\"async\" style=\"height: 122px; width: 107px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/question_images\/1642664584-8u7jg9.jpg\" \/><br \/>\n<strong>Prepare for Exams with myCBSEguide App \u2013 Download Now!<\/strong>Want to ace your exams? Download the <a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide\"><strong>myCBSEguide App<\/strong><\/a> today and access a vast collection of study material for <strong>CBSE<\/strong>, <strong>NCERT<\/strong>, <strong>JEE (Main)<\/strong>, <strong>NEET-UG<\/strong>, and <strong>NDA<\/strong> exams. The app provides everything from practice questions and model papers to in-depth solutions, helping students build a strong foundation and perform exceptionally well in their exams. Regular practice with the <strong>Class 10 Science Sample Papers 2025<\/strong> will improve your problem-solving skills and boost your confidence, ensuring you\u2019re fully prepared to tackle the exam and perform well.For teachers, the <a href=\"https:\/\/play.google.com\/store\/apps\/details?id=com.examin8.exam\"><strong>Examin8 App<\/strong><\/a> is an ideal tool to create customized exam papers with personalized branding, including your name and logo. This makes it easy to design and share professional exam papers with your students.Visit the <a href=\"https:\/\/mycbseguide.com\/\"><strong>myCBSEguide<\/strong><\/a> and <a href=\"https:\/\/examin8.com\/\"><strong>Examin8<\/strong><\/a> websites today to enhance your exam preparation and teaching resources.<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<p style=\"text-align: center;\"><strong>Login into our <a href=\"https:\/\/mycbseguide.com\/dashboard\/\">student dashboard<\/a>.<\/strong><\/p>\n<p style=\"text-align: center;\"><b><strong><a class=\"button\" href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide&amp;referrer=utm_source%3Dmycbse_bottom%26utm_medium%3Dtext%26utm_campaign%3Dmycbseads\">Download myCBSEguide App<\/a><\/strong><\/b><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Sample_Papers_for_Class_10_2025\"><\/span><strong>Sample Papers for Class 10 2025<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li><a href=\"https:\/\/mycbseguide.com\/course\/cbse-class-10-mathematics\/1202\/\"><strong>Mathematics<\/strong><\/a><\/li>\n<li><a href=\"https:\/\/mycbseguide.com\/course\/cbse-class-10-science\/1176\/\"><strong>Science<\/strong><\/a><\/li>\n<li><a href=\"https:\/\/mycbseguide.com\/course\/cbse-class-10-social-science\/1896\/\"><strong>Social Science<\/strong><\/a><\/li>\n<li><a href=\"https:\/\/mycbseguide.com\/course\/cbse-class-10-english-language-and-literature\/1903\/\"><strong>English Language and Literature<\/strong><\/a><\/li>\n<li><a href=\"https:\/\/mycbseguide.com\/course\/cbse-class-10-%E0%A4%B9%E0%A4%BF%E0%A4%82%E0%A4%A6%E0%A5%80-%E0%A4%8F\/1905\/\"><strong>Hindi Course A<\/strong><\/a><\/li>\n<li><a href=\"https:\/\/mycbseguide.com\/course\/cbse-class-10-%E0%A4%B9%E0%A4%BF%E0%A4%82%E0%A4%A6%E0%A5%80-%E0%A4%AC\/1907\/\"><strong>Hindi Course B<\/strong><\/a><\/li>\n<\/ul>\n<p><strong>Download CBSE Class 10 Sample Papers for Science, Math, English, Hindi &amp; More on myCBSEguide<\/strong><\/p>\n<p>Looking for CBSE Class 10 sample papers? Visit the <a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide\"><strong>myCBSEguide<\/strong><\/a> app or <strong><a href=\"https:\/\/mycbseguide.com\/\">myCBSEGuide<\/a><\/strong> website to download comprehensive <strong>sample papers<\/strong> for <strong>Science<\/strong>, <strong>Mathematics<\/strong>, <strong>Social Science<\/strong>, <strong>English Communicative<\/strong>, <strong>English Language and Literature<\/strong>, <strong>Hindi Course A<\/strong>, and <strong>Hindi Course B<\/strong>. For teachers, the <a href=\"https:\/\/play.google.com\/store\/apps\/details?id=com.examin8.exam\"><strong>Examin8 App<\/strong><\/a> is an ideal tool to create customized exam papers with personalized branding, including your name and logo. This makes it easy to design and share professional exam papers with your students. For more visit the\u00a0<a href=\"https:\/\/examin8.com\/\"><strong>Examin8<\/strong><\/a> website. To succeed in your CBSE exams, practicing <strong>Class 10 Science Sample Papers 2025<\/strong> is essential.<\/p>\n<p><strong>myCBSEguide<\/strong> offers a complete set of resources, including:<\/p>\n<ul>\n<li><strong>Sample Papers with Solutions<\/strong><\/li>\n<li><strong>Chapter-wise Test Papers<\/strong> for focused practice<\/li>\n<li><strong>NCERT Solutions<\/strong> and <strong>NCERT Exemplar Solutions<\/strong><\/li>\n<li><strong>Quick Revision Notes<\/strong> for efficient study<\/li>\n<li><strong>CBSE Guess Papers<\/strong> and <strong>Important Question Papers<\/strong><\/li>\n<\/ul>\n<p>Access all these study materials through the <strong>myCBSEguide app<\/strong>\u2014the top-rated app for CBSE students\u2014or visit the <strong>myCBSEguide website<\/strong> for easy downloads. Start practicing now to improve your performance in the upcoming exams!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Class 10 Science Sample Papers 2025 The Central Board of Secondary Education (CBSE) will be conducting the Class 10 board exams in February-March 2025. To help students prepare effectively, CBSE has released the latest sample papers for the 2024-25 academic session. These sample papers are available for free download on the official myCBSE website and &#8230; <a title=\"Class 10 Science Sample Papers 2025\" class=\"read-more\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-sample-papers-class-10-science\/\" aria-label=\"More on Class 10 Science Sample Papers 2025\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1339,1998,1367,2005],"tags":[448,1043,1527,12,1341,1933,1959,1967,1340],"class_list":["post-13720","post","type-post","status-publish","format-standard","hentry","category-cbse-sample-papers","category-class-10-sample-papers","category-science-cbse-class-10","category-science-sample-papers-class-10-sample-papers","tag-cbse-class-10","tag-cbse-class-10-science","tag-cbse-question-paper","tag-cbse-sample-papers","tag-cbse-sample-papers-2018-19","tag-cbse-sample-papers-2023","tag-cbse-sample-papers-2024","tag-cbse-sample-papers-2025","tag-model-question-papers"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Class 10 Science Sample Papers 2025 | myCBSEguide<\/title>\n<meta name=\"description\" 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