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/ I IDRANANDANI FOUNDATION SCHOOL, THANE First Preliminary Assessment, November 2024 I Subject: Chemistry CLASS: X DATE: Time: Two hours 1..4/ II /1oi4 Max Marks: 80 Answers ~o this paper must be written on the separate answer sheet. The time given at the head ofthis paper is the time allotted to write the answers. This question paper consists of07 printed pages. The time given at the head ofthis paper is the time allowedfor writing the answers. ' Section A is compulsory. Attempt any four questions from Sectio~ B. The intended marks for each question or sub-question are given in the brackets { ]. M , 1 SECTION A (Attempt all questions from this Section) Question 1 Choose one correct answer from the given options: (Do not copy the question, write the correct answer only.) ' i) When a compound was electrolysed using inert electrodes, the gas released at the anode made a glowing splinter rekindle. The electrolyte that will not produce such gas at the.anode is: a) diluted solution of NaCl. b) concentrated solution of NaCl. c) diluted solution of copper sulphate. d) acidified water. ii) The white precipitate which is soluble in excess ofNH,OH is of _ _ _ __ a) Lead chloride b) Barium chloride c) Silver chloride d) Zinc chloride iii) The molecular masses ,ofhydrogen, Sulphur dioxide and chlorine are 2, 64 and 71 respectively. Statement A: 2g of hydrogen contains same number of molecules as 71 g of Chlorine. Statement B : 2 g of hydrogen contains same number of molecules as 32 g of Sulphur dioxide. a) Only A is correct b) Only B is correct c) Both A and B are correct d) Neither A nor B is correct iv) Assertion (A) : Pb(OH)CI is a basic salt. Reason ( R): The OH 1 ions of Pb(OH)2 are partially replaced by H1+ions of acid. Page 1 of 7 [15] I I
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