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ISC Specimen Paper Chemistry 2014

7 pages, 74 questions, 3 questions with responses, 3 total responses,

Rutwik Pandya
Zydus School for Excellence (ZSE), Vejalpur, Ahmedabad

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CHEMISTRY PAPER 1 (THEORY) (Three Hours) (Candidates are allowed additional 15 minutes for only reading the paper. They must NOT start writing during this time.) --------------------------------------------------------------------------------------------------------------------Answer all questions in Part I and six questions from Part II, choosing two questions from Section A, two from Section B and two from Section C. 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 [ ]. Balanced equations must be given wherever possible and diagrams where they are helpful. 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-1 mol-1 = 8.314 JK-1 mol-1 = 0.0821 dm3 atm K-1mol-1 1 l atm = 1 dm3 atm = 101.3 J. 1 Farday = 96500 Coulombs. Avagadro s number = 6.023 1023. --------------------------------------------------------------------------------------------------------------------PART I (20 Marks) Answer all questions. Question 1 (a) Fill in the blanks by choosing the appropriate word/words from those given in the brackets: (acetaldehyde, salt solution, 0.68, R, formaldehyde, buffer solution, 0.524, i, calcium formate, 50 minutes, below, 45 minutes, 0.74, van t Hoff factor, Raoult s Law, weak, strong, increases, decreases, positive, negative, above.) (i) (ii) [5] The solution obtained by mixing appropriate amount of _______base and its salt with strong acid is called ________. An aqueous solution of glucose boils ______ 100oC and freezes ______ 0oC. (iii) The ratio of the observed value of a colligative property to the normal value of the same property is termed as ________ and is represented by letter _______. (iv) When a mixture of calcium acetate and _______ is subjected to dry distillation ________ is obtained. (v) A _________ catalyst increases the rate of a chemical reaction while a negative catalyst _________ the rate of the reaction. 1 ISC Specimen Question Paper 2014

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