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CBSE Class 9 Pre Board 2021 : Science - Annual Final (CBSE Gulf Sahodaya Qatar Chapter, Doha)

9 pages, 115 questions, 9 questions with responses, 9 total responses,

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Annual Examination, 2020-2021 SCIENCE Grade: 9 Date: 10.02.2021 Time: 3 Hours Max. Marks: 80 General Instructions. (i) (ii) (iii) (iv) (v) (vi) (vii) The question paper comprises four sections A, B, C and D. There are 36 questions in the question paper. All questions are compulsory. Section A - question no. 1 to 20 - all questions and parts thereof are of one mark each. These questions contain multiple choice questions (MCQs), very short answer questions and assertion - reason type questions. Answers to these should be given in one word or one sentence. Section B - question no. 21 to 26 are short answer type questions, carrying 2 marks each. Answers to these questions should in the range of 30 to 50 words. Section C - question no. 27 to 33 are short answer type questions, carrying 3 marks each. Answers to these questions should in the range of 50 to 80 words. Section D question no. - 34 to 36 are long answer type questions carrying 5 marks each. Answer to these questions should be in the range of 80 to 120 words. There is no overall choice. However, internal choices have been provided in some questions. A student has to attempt only one of the alternatives in such questions. Wherever necessary, neat and properly labeled diagrams should be drawn. SECTION - A 1. What are alpha particles? 1 (OR) Define nucleus. 2. The formula of bleaching powder is CaOCl2. Calculate its formula unit mass. 1 (Given atomic masses: Ca = 40u, O =16u, Cl = 35.5u) 3. Suggest separation techniques one would need to employ to separate the following mixtures. 1 a) Mercury and water b) Potassium chloride and Ammonium chloride. 4. Which law gives the measure of force? Write an expression for force. 1 5. The distance between two objects is decreased. Will the gravitational force between them increase or decrease? 1 6. Name the principle on which rocket works. 1 7. Differentiate between speed and velocity. 1 1 of 9

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