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CBSE 10th Board Class 10 2019 : Mathematics

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Class-X Science-086 SAMPLE QUESTION PAPER-19 TIME: 3 Hrs. M.M.:80 General Instructions: (i) The question paper comprises of five sections A, B, C, D and E. You are to attempt all the sections. (ii) All questions are compulsory. (iii) Internal choice is given in sections B, C, D and E. (iv) Question numbers 1 and 2 in Section-A are one mark questions. They are to be answered in one word or in one sentence. (v) Question numbers 3 to 5 in Section- B are two marks questions. These are to be answered in about 30 words each. (vi) Question numbers 6 to 15 in Section-C are three marks questions. These are to be answered in about 50 words each. (vii) Question numbers 16 to 21 in Section-D are 5 marks questions. These are to be answered in about 70 words each. (viii) Question numbers 22 to 27 in Section- E are based on practical skills. Each question is a two marks question. These are to be answered in brief. SECTION A 1. Name a common nutrient that is absorbed in the small intestine and reabsorbed by the kidney tubules. 1 2. The presence of a particular group of bacteria in water bodies indicates contamination. Identify the group. 1 SECTION B 3. How is Magnesium Chloride formed by the transfer of electrons? Why does the solution of Magnesium chloride conduct electricity? 2 4. In a flowering plant, summarize the events that take place after fertilization. 2 5. A ray of light enters into benzene from air. If the refractive index of benzene is 1.50, by what percent does the speed of light reduce on entering the benzene? 2 OR For the same angle of incidence in media A,B and C, the angles of refraction are 200, 300 and 400 respectively. In which medium will the velocity of light be maximum? Give reason in support of your answer. 1

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