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Class 10 CBSE Board Exam 2017 : Mathematics (Govt. Co - Edn Sr Sec School)

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SUMMATIVE ASSESSMENT-I, 2015-16 Class X/ SCIENCE Time allowed: 3 hours RWSTOL5 Maximum Marks: 90 General Instructions: 1. The question paper comprises of two Sections, A and B. You are to attempt both the sections. 2. All questions are compulsory. 3. All questions of Section-A and all questions of Section-B are to be attempted separately. 4. Question numbers 1 to 3 in section-A are one mark questions. These are to be answered in one word or in one sentence. 5. Question number 4 to 6 in section-A are two marks questions. These are to be answered in about 30 words each. 6. Question numbers 7 to 18 in section-A are three marks questions. These are to be answered in about 50 words each 7. Question number 19 to 24 in section-A are five marks questions. These are to be answered in about 70 words each. 8. Question number 25 to 33 in section-B are multiple choice questions based on practical skills. Each question is a one mark question. You are to select one most appropriated response our of the four provided to you. 9. Question numbers 34 to 36 in section-B are questions based on practical skills. Each question is of two marks. Section-A Q. 1 Name two components of central nervous system in Humans. 1 Q. 2 Name the device that helps to maintain a potential difference across a conductor. 1 Q. 3 State one use of glass cover in box type solar cookers. 1 Q. 4 Write the chemical formula of Bleaching powder. How is bleaching powder prepared? 2 For what purpose is it used in drinking water? Q. 5 On heating copper powder in air the surface of copper powder becomes coated with black CuO. How can this black coating be converted into brown copper? Write chemical equation for the reaction that occurs during the colour change. 2 Q. 6 (i) Write the balanced chemical equation for the process of photosynthesis. 2 (ii) when do the desert plants take-up carbon dioxide and perform photosynthesis? Material downloaded from http://myCBSEguide.com and http://onlineteachers.co.in

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