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Class 10 CBSE Pre Board 2016 : Science (Kendriya Vidyalaya (KV) No. 1, Salt Lake)

11 pages, 60 questions, 51 questions with responses, 67 total responses,

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Sample Question Paper 2016 Science Class X (SA II) Time allowed: 03 Hours Maximum Marks: 90 General Instructions: (i) (ii) (iii) (iv) (v) The question paper comprises two sections, A and B. You are to attempt both the sections. All questions are compulsory. There is no choice in any of the question. All questions of Section-A and B are to be attempted separately. Question numbers 1 to 3 in Section - A are one mark question. They are to be answered in one word or in one sentence. (vi) Question numbers 4 to 6 in Section - A are two marks questions. These are to be answered in 30 words each. (vii) Question numbers 7 to 18 in Section - A are three marks questions. These are to be answered in about 50 words each. (viii) Question numbers 19 to 24 in Section-A are 5 marks questions. These are to be answered in 70 words each. (ix) 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. (x) Question numbers 34 to 36 in Section B are two marks questions based on practical skills. These are to be answered in brief. SECTION A 1 Name the process of converting vegetable oil to vegetable ghee. 1 2 Give reason for the statement- Since the ovary releases one egg every month, the uterus also prepares itself every month by making its lining thick and spongy. 1 3 Name the component of white light that has the greatest wavelength. 1 4 Which natural resource are the biodiversity hot spots ? Suggest what happens when there is a loss of biodiversity? 2 5 Write the name and molecular formula of an organic compound having its name suffixed with ol and having two carbon atoms in the molecule. With the help of a balanced equation indicate what happens when its heated with excess of conc. H2SO4. + +1 6 A cube of edge 6 cm is placed over a printed page. At what distance from the top surface of cube will the letters appear when seen from above? Refractive index of glass is 1.5 2 7 What is meant by isomers? We can not have isomers of the first three members of alkane series give reason to justify this statement. Draw the structures of two isomers of pentane, C5H12 1+1+1 8 i) Name the following: Sample Question Paper 2 Pg 1 of 5

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