{"id":23448,"date":"2018-12-12T10:48:11","date_gmt":"2018-12-12T05:18:11","guid":{"rendered":"http:\/\/mycbseguide.com\/blog\/?p=23448"},"modified":"2023-03-22T16:43:15","modified_gmt":"2023-03-22T11:13:15","slug":"cbse-question-paper-2015-class-10-science","status":"publish","type":"post","link":"https:\/\/mycbseguide.com\/blog\/cbse-question-paper-2015-class-10-science\/","title":{"rendered":"CBSE Question Paper 2015 class 10 Science"},"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-question-paper-2015-class-10-science\/#Class_10_Science_list_of_chapters\" >Class 10 Science list of chapters<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-question-paper-2015-class-10-science\/#Last_Year_Question_Paper_Class_10_Science_2015\" >Last Year Question Paper Class 10 Science 2015<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-question-paper-2015-class-10-science\/#Section%E2%80%93_A\" >Section\u2013 A<\/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-question-paper-2015-class-10-science\/#SECTION_B\" >SECTION: B<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-question-paper-2015-class-10-science\/#CBSE_Question_Paper_2015_class_10_Science\" >CBSE Question Paper 2015 class 10 Science<\/a><\/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-question-paper-2015-class-10-science\/#Previous_Year_Question_Paper_for_class_10_in_PDF\" >Previous Year Question Paper for class 10 in PDF<\/a><\/li><\/ul><\/nav><\/div>\n<p><strong>CBSE Question Paper 2015 class 10 Science<\/strong>\u00a0conducted by Central Board of Secondary Education, New Delhi in the month of March 2015. CBSE previous year question papers with solution are available in myCBSEguide mobile app and cbse guide website. The Best CBSE App for students and teachers is myCBSEguide which provides complete study material and practice papers to CBSE schools in India and abroad.<\/p>\n<p style=\"text-align: center;\"><strong>Question Paper 2015 class 10 Science<\/strong><\/p>\n<p style=\"text-align: center;\"><strong>\u00a0<\/strong><strong><a class=\"button\" href=\"https:\/\/mycbseguide.com\/downloads\/cbse-class-10-science\/1176\/cbse-last-year-papers\/3\/\">Download as PDF<\/a><\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright\" src=\"https:\/\/media-mycbseguide.s3.ap-south-1.amazonaws.com\/images\/blog\/10%20Science%20Book.jpg\" alt=\"CBSE Question Paper 2015 class 10 Science\" width=\"132\" height=\"163\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Class_10_Science_list_of_chapters\"><\/span>Class 10 Science list of chapters<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li>Chemical Reactions and Equations<\/li>\n<li>Acids, Bases and Salts<\/li>\n<li>Metals and Non-metals<\/li>\n<li>Carbon and Its Compounds<\/li>\n<li>Periodic Classification of Elements<\/li>\n<li>Life Processes<\/li>\n<li>Control and Coordination<\/li>\n<li>How do Organisms Reproduce?<\/li>\n<li>Heredity and Evolution<\/li>\n<li>Light Reflection and Refraction<\/li>\n<li>Human Eye and Colourful World<\/li>\n<li>Electricity<\/li>\n<li>Magnetic Effects of Electric Current<\/li>\n<li>Sources of Energy<\/li>\n<li>Our Environment<\/li>\n<li>Management of Natural Resources<\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"Last_Year_Question_Paper_Class_10_Science_2015\"><\/span>Last Year Question Paper Class 10 Science 2015<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div>\n<div>\n<p><strong>General Instructions:<\/strong><br \/>\na. This question paper contains two parts A and B.<br \/>\nb. Both the parts are compulsory for all.<br \/>\nc. All parts of questions should be attempted separately<br \/>\nd. Question numbers 1 to 3 in Section \u2013 A are one marks questions. These are to be answered in one word or in one sentence.<br \/>\ne. Question numbers 4 to 6 in Section \u2013 A are two marks questions. These are to be answered in about 30 words each.<br \/>\nf. Question numbers 7 to 18 in Section \u2013 A are three marks questions. These are to be answered in about 50 words each.<br \/>\ng. Question numbers 19 to 24 in Section \u2013 A are five marks questions. These are to be answered in about 70 words each.<br \/>\nh. Question numbers 25 to 33 in Section \u2013 B are multiple choice questions based on practical skills. Each question is a one &#8211; mark question. You are to select one most appropriate response out of the four provided to you.<br \/>\ni. Question numbers 34 to 36 in Section \u2013 B are questions based on practical skills. Each question is a two marks question.<\/p>\n<hr \/>\n<h3 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"Section%E2%80%93_A\"><\/span><strong> Section\u2013 A<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>1. <\/strong>Write the name and formula of the 2 nd member of homologous series having general formula <img decoding=\"async\" style=\"height: 24px; width: 44px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image001.png\" \/>.<\/p>\n<p><strong>2. <\/strong>List two functions performed by the testis in human beings.<\/p>\n<p><strong>3. <\/strong>What is the function of ozone in the upper atmosphere?<\/p>\n<p><strong>4. <\/strong>List four characteristics of the images formed by plane mirrors.<\/p>\n<p><strong>5. <\/strong>Why are forests considered \u201cbiodiversity hotspots\u201d? List two ways in which an individual can contribute effectively to the management of forests and wildlife.<\/p>\n<p><strong>6. <\/strong>What is meant by \u201csustainable management\u201d? Why is reuse considered better than recycling?<\/p>\n<p><strong>7. <\/strong>With the help of an example, explain the process of hydrogenation. Mention the essential conditions for the reaction and state the change in physical property with the formation of the product.<\/p>\n<p><strong>8. <\/strong>What is the difference between the molecules of soaps and detergents, chemically? Explain the cleansing action of soaps.<\/p>\n<p><strong>9. <\/strong>How many groups and periods are there in the modern periodic table? How do the atomic size and metallic character of elements vary as we move:<\/p>\n<p>(a) down a group and<\/p>\n<p>(b) from left to right in a period<\/p>\n<p><strong>10. <\/strong>From the following elements:<\/p>\n<p><strong><img decoding=\"async\" style=\"height: 24px; width: 131px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image002.png\" \/> <\/strong><\/p>\n<p>(i) Select the element having one electron in the outermost shell.<\/p>\n<p>(ii) Two elements of the same group.<\/p>\n<p>Write the formula of and mention the nature of the compound formed by the union of <img decoding=\"async\" style=\"height: 24px; width: 28px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image003.png\" \/> and element X (2, 8, 7).<\/p>\n<p><strong>11. <\/strong>What is DNA copying? State its importance.<\/p>\n<p><strong>12. <\/strong>Explain budding in hydra with the help of labelled diagrams only.<\/p>\n<p><strong>13.<\/strong> List any four methods of contraceptions used by humans. How does their use have a direct effect on the health and prosperity of a family.<\/p>\n<p><strong>14. <\/strong>\u201cWe cannot pass on to our progeny the experiences and qualifications earned during our life time.\u201d Justify the statement giving reason and examples.<\/p>\n<p><strong>15. <\/strong>(i) Planaria, insects, octopus and vertebrates all have eyes. Can we group eyes of these animals together to establish a common evolutionary origin? Justify your answer.<\/p>\n<p>(ii) \u201cBirds have evolved from reptiles\u201d. State evidence to prove the statement.<\/p>\n<p><strong>16.<\/strong> To construct a ray diagram we use two rays of light which are so chosen that it is easy to determine their directions after reflection from the mirror.<\/p>\n<p>Choose these two rays after reflection from a concave mirror. Use these two rays to find the nature and position of the image of an object placed at a distance 15cm from a concave mirror of focal length 10cm.<\/p>\n<p><strong>17. <\/strong>With the help of labelled diagram, explain why the sun appears reddish at the sun-rise and the sun-set.<\/p>\n<p><strong>18. <\/strong>After the examinations, Rakesh with his friends went on a picnic to a nearby park. All friends carried cooked food packed in plastic bags or plastic cans.<\/p>\n<p>After eating the food some friends collected the leftover food and plastic bags etc and planned to dispose them off by burning.<\/p>\n<p>Rakesh immediately cheked them and suggested to segregate the leftover food and peels of fruits from the plastic materials and respectively dispose them off separately in the green and red dustbins placed in the corner of the park.<\/p>\n<p>(a) In your opinion, is burning plastic an eco-friendly method of waste disposal? Why? State the advantage of method suggested by Rakesh?<\/p>\n<p>(b) How can we contribute in maintaining the parks and roads neat and clean?<\/p>\n<p><strong>19. <\/strong>Explain why carbon forms compounds mainly by covalent bond. Explain in brief two main reasons for carbon forming a large number of compounds. Why does carbon form strong bonds with most other elements?<\/p>\n<p><strong>20. <\/strong>Write the functions of the following in human female reproductive system:<\/p>\n<p>Ovary, oviduct, uterus<\/p>\n<p>How does the embryo get nourishment inside the mother\u2019s body? Explain in brief.<\/p>\n<p><strong>21. <\/strong>How many pairs of chromosomes are present in human beings? Out of these how many sex chromosomes? How many types of sex chromosomes are found in human beings? \u201c<\/p>\n<p>The sex of a new born child is matter of chance and none of the parents may be considered responsible for it\u201d. Draw a flow chart showing determination of sex of a new born to justify this statement.<\/p>\n<p><strong>22. <\/strong>(a) State the laws of refraction of light. Explain the term absolute refractive index of a medium and write an expression to relate it with the speed of light in vacuum.<\/p>\n<p>(b) The absolute refractive indices of two media \u2018A\u2019 and \u2018B\u2019 are 2.0 and 1.5 respectively. If the speed of light in medium \u2018B\u2019 is <img decoding=\"async\" style=\"height: 21px; width: 44px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image004.png\" \/> m\/s, calculate the speed of light in:<\/p>\n<p>(i) vacuum,<\/p>\n<p>(ii) medium \u2018A\u2019.<\/p>\n<p><strong>23. <\/strong>\u201cA convex lens can form a magnified erect as well as magnified inverted image of an object placed in front of it\u201d. Draw ray diagram to justify this statement string the position of the object with respect to the lens in each case.<\/p>\n<p>An object of height 4 cm is placed at a distance of 20cm from a concave lens of focal length 10cm. Use lens formula to determine the position of the image formed.<\/p>\n<p><strong>24. <\/strong>A student is unable to see clearly the words written on the black board at a distance of approximately 4m from him. Name the defect of vision the boy is suffering from. Explain the method of correcting this defect. Draw ray diagram for the:<\/p>\n<p>(i) defect of vision and also<\/p>\n<p>(ii) for its correction.<\/p>\n<hr \/>\n<h3 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"SECTION_B\"><\/span><strong>SECTION: B<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>25. <\/strong>A student adds 2ml of acetic acid to a test tube containing 2ml of distilled water. He then shakes the test tube well and leaves it to settle for some time. After about 5 minutes he observes that in the test tube there is:<\/p>\n<p>(A) a clear transparent colourless solution<\/p>\n<p>(B) a clear transparent pink solution<\/p>\n<p>(C) a precipitate settling at the bottom of the test tube<\/p>\n<p>(D) a lawyer of water over the layer of acetic acid<\/p>\n<p><strong>26. <\/strong>A student prepared 20% sodium hydroxide solution in a beaker to study saponification reaction. Some observations related to this are given below:<\/p>\n<p>(i) Sodium hydroxide solution turns red litmus blue<\/p>\n<p>(ii) Sodium hydroxide readily dissolves in water<\/p>\n<p>(iii) The beaker containing solution appears cold when touched from outside<\/p>\n<p>(iv) The blue litmus paper turns red when dipped into the solution.<\/p>\n<p>The correct observations are:<\/p>\n<p>(A) (i), (ii) and (iv)<\/p>\n<p>(B) (i), (ii) and (iii)<\/p>\n<p>(C) only (iii) and (iv)<\/p>\n<p>(D) only (i) and (ii)<\/p>\n<p><strong>27. <\/strong>Hard water is not available for an experiment. Some salts are given below:<\/p>\n<p>(i) Sodium chloride<\/p>\n<p>(ii) Sodium sulphate<\/p>\n<p>(iii) Calcium chloride<\/p>\n<p>(iv) Calcium sulphate<\/p>\n<p>(v) Potassium chloride<\/p>\n<p>(vi) Magnesium sulphate<\/p>\n<p>Select from the following a group of these salts, each member of which may be dissolved in water to make it hard.<\/p>\n<p>(A) (i), (ii) and (v)<\/p>\n<p>(B) (i), (iii), (v)<\/p>\n<p>(C) (iii), (iv), (vi)<\/p>\n<p>(D) (ii), (iv), (vi)<\/p>\n<p><strong>28. <\/strong>A student indentified the various party of an embryo of a gram seed and listed them as given below:<\/p>\n<p>(i) Testa<\/p>\n<p>(ii) Plumule<\/p>\n<p>(iii) Radicle<\/p>\n<p>(iv) Cotyledon<\/p>\n<p>(v) Tegman<\/p>\n<p>Out of these the actual parts of the embryo are:<\/p>\n<p>(A) (i), (ii), (iii)<\/p>\n<p>(B) (ii), (iii), (iv)<\/p>\n<p>(C) (iii), (iv), (v)<\/p>\n<p>(D) (ii), (iv), (v)<\/p>\n<p><strong>29. <\/strong>For students A, B, C and D reported the following set of organs to be homologous. Who is correct?<\/p>\n<p>(A) Wings of a bat and a butterfly<\/p>\n<p>(B) Wings of a pigeon and a bat<\/p>\n<p>(C)Wings of a pigeon and a butterfly<\/p>\n<p>(D) Forelimbs of a cow, a duck and a lizard<\/p>\n<p><strong>30. <\/strong>Study the following diagram and select the correct statement about the device \u2018X\u2019:<\/p>\n<p><img decoding=\"async\" id=\"Picture 9\" style=\"height: 118px; width: 193px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image005.jpg\" \/><\/p>\n<p>(A) Device \u2018X\u2019 is a concave mirror of radius of curvature 12 cm.<\/p>\n<p>(B) Device \u2018X\u2019 is a concave mirror of focal length 6 cm.<\/p>\n<p>(C) Device \u2018X\u2019 is a concave mirror of focal length 12 cm.<\/p>\n<p>(D) Device \u2018X\u2019 is a convex mirror of focal length 12 cm.<\/p>\n<p><strong>31. <\/strong>A student has obtained a point image of a distant object using the given convex lens. To find the focal length of the lens he should measure the distance between the:<\/p>\n<p>(A) lens and the object only<\/p>\n<p>(B) lens and the screen only<\/p>\n<p>(C) object and the image only<\/p>\n<p>(D) lens and the object and also between the object and the image<\/p>\n<p><strong>32. <\/strong>Four students P, Q, R and S traced the path of a ray of light passing through a glass slab for an angle of incidence <img decoding=\"async\" style=\"height: 21px; width: 27px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image006.png\" \/> and measured the angle of refraction. The value as measured them were <img decoding=\"async\" style=\"height: 21px; width: 24px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image007.png\" \/>, <img decoding=\"async\" style=\"height: 21px; width: 27px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image008.png\" \/>, <img decoding=\"async\" style=\"height: 21px; width: 27px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image009.png\" \/> and <img decoding=\"async\" style=\"height: 21px; width: 25px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image010.png\" \/> respectively. The student who has performed the experiment methodically is<\/p>\n<p>(A) P<\/p>\n<p>(B) Q<\/p>\n<p>(C) R<\/p>\n<p>(D) S<\/p>\n<p><strong>33. <\/strong>After tracing the path of a ray of light through a glass prism a student marked the angle of incidence <img decoding=\"async\" style=\"height: 21px; width: 34px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image011.png\" \/>, angle of refraction<img decoding=\"async\" style=\"height: 21px; width: 35px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image012.png\" \/>angle of emergence <img decoding=\"async\" style=\"height: 21px; width: 35px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image013.png\" \/>and the angle of deviation <img decoding=\"async\" style=\"height: 21px; width: 40px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image014.png\" \/>as shown in the diagram. The correctly marked angles are:<\/p>\n<p><img decoding=\"async\" id=\"Picture 10\" style=\"height: 106px; width: 173px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image015.jpg\" \/><\/p>\n<p>(A) <img decoding=\"async\" style=\"height: 21px; width: 34px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image011.png\" \/>and <img decoding=\"async\" style=\"height: 21px; width: 35px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image012.png\" \/><\/p>\n<p>(B) <img decoding=\"async\" style=\"height: 21px; width: 34px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image011.png\" \/>and <img decoding=\"async\" style=\"height: 21px; width: 35px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image013.png\" \/><\/p>\n<p>(C) <img decoding=\"async\" style=\"height: 21px; width: 34px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image011.png\" \/>, <img decoding=\"async\" style=\"height: 21px; width: 35px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image013.png\" \/>and <img decoding=\"async\" style=\"height: 21px; width: 40px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image014.png\" \/><\/p>\n<p>(D) <img decoding=\"async\" style=\"height: 21px; width: 34px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image011.png\" \/>,<img decoding=\"async\" style=\"height: 21px; width: 35px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image012.png\" \/> and <img decoding=\"async\" style=\"height: 21px; width: 35px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/10\/science\/sa2\/16_1\/image013.png\" \/><\/p>\n<p><strong>34. <\/strong>List two observations which you make when you add a pitch of sodium hydrogen carbonate to acetic acid in a test tube. Write chemical equation for the reaction that occurs.<\/p>\n<p><strong>35. <\/strong>Name the type of asexual reproduction in which two individuals are formed from a single parent and the parental identity is lost. Draw the initial and the final stages of this type of reproduction. State the event with which this reproduction starts.<\/p>\n<p><strong>36. <\/strong>To find the image-distance for varying object-distances in case of a convex lens, a student obtains on a screen a sharp image of a bright object placed very far from the lens. After that he gradually moves the object towards the lens and each time focuses its image of the screen.<\/p>\n<p>(a) In which direction \u2013 towards or away from the lens, does he move the screen to focus the object?<\/p>\n<p>(b) What happens to the size of image -does it increase or decrease?<\/p>\n<p>(c) What happen when he moves the object very close to the lens.<\/p>\n<\/div>\n<\/div>\n<p style=\"text-align: center;\"><strong>These are questions only. To view and download complete question paper with solution install myCBSEguide App from google play store or login to our\u00a0<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><b>.<\/b><\/p>\n<h2><span class=\"ez-toc-section\" id=\"CBSE_Question_Paper_2015_class_10_Science\"><\/span>CBSE Question Paper 2015 class 10 Science<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Download class 10 Science question paper with solution from best CBSE App the myCBSEguide. CBSE class 10 Science paper 2015 in PDF format with solution will help you to understand the latest question paper pattern and marking scheme of the CBSE board examination. You will get to know the difficulty level of the question paper.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Previous_Year_Question_Paper_for_class_10_in_PDF\"><\/span>Previous Year Question Paper for class 10 in PDF<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>CBSE question papers 2018, 2017, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005 and so on for all the subjects are available under this download link. Practicing real question paper certainly helps students to get confidence and improve performance in weak areas.<\/p>\n<ul>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-10-mathematics\/1202\/cbse-last-year-papers\/3\/\">Mathematics Class 10<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-10-science\/1176\/cbse-last-year-papers\/3\/\">Science Class 10 Class 10<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-10-social-science\/1896\/cbse-last-year-papers\/3\/\">Social Science Class 10<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-10-english-communicative\/1901\/cbse-last-year-papers\/3\/\">English Communicative Class 10<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-10-english-language-and-literature\/1903\/cbse-last-year-papers\/3\/\">English Language and Literature Class 10<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-10-hindi-course-a\/1905\/cbse-last-year-papers\/3\/\">Hindi Course-A Class 10<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-10-hindi-course-b\/1907\/cbse-last-year-papers\/3\/\">Hindi Course-B Class 10<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-10\/1175\/\">Other Subjects Class 10<\/a><\/li>\n<\/ul>\n<p>To download previous year question papers for class 10 Mathematics, Science, Social Science, English Communicative, English Language and Literature, Hindi Course A, Hindi Course B, and Other subjects; do check myCBSEguide app or website. myCBSEguide provides sample papers with solution, test papers for chapter-wise practice, NCERT solutions, NCERT Exemplar solutions, quick revision notes for ready reference, CBSE guess papers and CBSE important question papers. Sample Paper all are made available through\u00a0<a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide&amp;referrer=utm_source%3Dmycbse_bottom%26utm_medium%3Dtext%26utm_campaign%3Dmycbseads\"><strong>the best app for CBSE students<\/strong><\/a>\u00a0and myCBSEguide website.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CBSE Question Paper 2015 class 10 Science\u00a0conducted by Central Board of Secondary Education, New Delhi in the month of March 2015. CBSE previous year question papers with solution are available in myCBSEguide mobile app and cbse guide website. The Best CBSE App for students and teachers is myCBSEguide which provides complete study material and practice &#8230; <a title=\"CBSE Question Paper 2015 class 10 Science\" class=\"read-more\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-question-paper-2015-class-10-science\/\" aria-label=\"More on CBSE Question Paper 2015 class 10 Science\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1346,1014,1367],"tags":[1043,1582,1527,438,80,349,1631],"class_list":["post-23448","post","type-post","status-publish","format-standard","hentry","category-cbse","category-cbse-question-papers","category-science-cbse-class-10","tag-cbse-class-10-science","tag-cbse-previous-year-paper","tag-cbse-question-paper","tag-class-10","tag-last-year-papers","tag-science","tag-ten-year-questions-papers"],"yoast_head":"<!-- This site is optimized with the 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