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GARDEN HIGH SCHOOL CLASS X Prelims, 2023 24 Chemistry Time: 2 hours Full Marks: 80 This Question Paper has seven printed pages. Answers must be written in the script/s provided. You will not be allowed to write for the first 15 minutes. This time must be spent in reading the Question Paper. The time given at the head of this Paper is the time allowed for writing answers. This Paper is divided into two Sections. Answer all the questions of Section A and any four of Section B. All parts of a question must be answered together in the correct order. Maximum marks for a question or parts of a question are given in brackets [ ]. SECTION A (40 marks) Answer all the questions. Question No 1 Choose the correct options: [15 1 = 15] (a) The weak electrolyte is (i) dilute hydrochloric acid. (ii) dilute sulphuric acid. (iii) sodium chloride solution. (iv) aqueous acetic acid. (b) The salt that is soluble in excess of both sodium hydroxide and ammonium hydroxide is (i) calcium nitrate. (iii) zinc chloride. (ii) ferric chloride. (iv) lead chloride. (c) Given: A A3+; B B 1 The number of electrons present in the outermost shell of atoms A and B respectively are (i) 5, 1. (ii) 3, 1. (iii) 3, 7. (iv) 5, 7. (d) The organic reaction that does not come under addition reaction is (i) hydrogenation. (iii) halogenation. (ii) dehydration. (iv) hydrohalogenation. (e) The alkene which decolourizes bromine water is (i) C6H14. (ii) C2H6. (iii) C3H4. (iv) C2H4.
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