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GUNDECHA EDUCATION ACADEMY FINAL PRELIMINARY EXAMINATION 2023-2024 STD X SCIENCE PAPER 2 (CHEMISTRY) (Two hours) DATE: 12/01/2024 MARKS: 80 Answers to this Paper must be written on the paper provided separately. You will not be allowed to write during the first 15 minutes. This time is to be spent in reading the Question Paper. The time given on the head of this paper is the time allowed for writing the answers. Section I is compulsory. Attempt any four questions from Section II. The intended marks for questions or parts of questions are given in brackets [ ]. SECTION I (40 MARKS) Attempt all questions from this Section Question 1 a) Choose the most appropriate answer from the choices given in each case: [15] (i) Jack wants to electroplate his spoon with silver. Which electrolyte solution is preferred for the below electroplating process? a) b) c) d) Silver chloride Silver nitrate Sodium argentocyanide Silver argentocyanide (ii) The salts formed by partial replacement of the replaceable hydrogen ion of an acid molecule by a basic radical is ________ salt. a) Acid b) Basic c) Normal d) Complex (iii) The branched chain isomer of butane C4H10 is ___________. a) n-butane b) 2,2-dimethyl propane c) 2-methyl butane d) 2-methyl propane GEA/FINAL PRELIMINARY EXAMINATION -2023-24 This paper consists of 7 printed pages Turn Over
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