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Class 10 CBSE 10th Board 2017 : Mathematics

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B K Singh Singh
O P Jindal School, Raigarh

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SUMMATIVE ASSESSMENT-I, 2016 Time : 3 hrs. SCIENCE Class X M.M. : 90 Date 10.09.2016 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 numbers 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 numbers 19 to 24 in Section-A are five marks questions. These are to be answered in about 70 words each. 8. Question numbers 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 appropriate response out 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 Why does a compass needle get deflected when brought near a bar magnet? (1) Q.2 List two gases generated in a bio-gas plant. (1) Q.3 What happens between the two neurons at the synapse? (1) Q.4 Why does the colour of copper sulphate solution change when an iron nail is dipped in it ? Write two observations. (2) Q.5 a) Why does a milkman add a very small amount of baking soda to fresh milk? (2) b) Write the chemical formula of baking soda. Q.6 How is the small intestine designed to absorb the digested food? (2) Q.7 a) Define the unit of current. Name the instrument used to measure electric current. How is it connected in a circuit? (3) b) Draw an electric circuit to describe ohm s law. Label the circuit components used to measure electric current and potential difference. Q.8 Q.9 Q.10 Write one application of each of the following a) Right hand thumb rule b) Fleming s left hand rule c) Fleming s right hand rule A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is a) pushed into the coil b) withdrawn from inside the coil c) held stationary inside the coil? a) Why is hydrogen considered a better and cleaner fuel than CNG? b) Mention any two areas where solar cells are used as source of energy. (3) (3) (3) c) State the biggest hindrance in trapping geothermal energy. (1/4)

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