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ISC Class XII Sample / Model Paper 2025 : Chemistry

6 pages, 52 questions, 0 questions with responses, 0 total responses,

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Practice Paper (2024-25) General Instructions: This paper is divided into four sections - A, B, C and D. Answer all questions. Section A consists of one question having sub-parts of one mark each. Section Bconsists of ten questions of two marks each. Section Cconsists of seven questions of three marks each, and Section D consists of three questions of five marks cach. Internal choices have been provided in one question each in Section B, Section C and Section D. All working, including rough work, should be done on the same sheet as, and adjacent to the rest of the answer. The intended marks for questions or parts of questions are given in brackets [ ]. When solving numerical problems, all essential working must be shown. In working out problems, use the following data: Gas constant R= 1.987 cal deg mol-! = 8B14 JK' moll = 0.082 l dm atm K'mol! latm = 1 dm3 atm= 101.3 J. 1Faraday=96500 coulombs. Avogadro's number =6.023x 103 SECTION A - 14 MARKS Question 1 (A) Fill in the blanks by choosing the appropriate word(s) from those given in the brackcts: [log R, 1/T, deoxyribose, ribose, HCI, H,SO4, Anhydrous ZnClz, anhydrous AlCls, 1',2*, 3]) 1. The plot of versus has slopes equal to Ea/R. 2. In RNA, the sugar is but in DNA, it is 3. Lucas reagent is a mixture of conc. 4. Aldehyde gives and alcohol whereas ketones gives (B) Select and write the correct 1. alcohol on reduction. alternative from the choices given below: Identify correct order basic strength of methyl substituted amine in aqueous solution. a. (CH)2NH> CH3NH,>(CH);N b. (CH)3N> CH;NH2 > (CH)>NH [4x1] [Sx1]

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