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ISC Board Specimen 2015 : Chemistry Paper 1 (Theory)

7 pages, 60 questions, 60 questions with responses, 196 total responses
Indian School Certificate Examination (ISC), New Delhi
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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: (hydrolysis, reduction, oxidation, vacant, osmotic, above, benzoic acid, phenol, aniline, below, can, decreases, increases, cannot, crystal, ionization, rate, rate constant.) (i) A catalyst ______ start a reaction but it can increase the ______ of the reaction. (ii) Electrons trapped in the ______ sites of the __________ lattice are called F-centres. (iii) An aqueous solution of sugar boils ________ 100oC and freezes _______ 0oC. (iv) Toluene on ________ with alkaline potassium permanganate gives________. (v) The degree of _________ of ammonium hydroxide ________ on addition of ammonium chloride. [5] ---------------------------------------------------------------------------------------------------------------------------40 ISC SAMPLE QUESTION PAPER 2015

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