SRJC H2 Chem 2013 Prelim P1 QP

1   Turn Over] SERANGOON JUNIOR COLLEGE General Certificate of Education Advanced Level Higher 2 Candidate Name Class CHEMISTRY 9647/01 JC2 Preliminary Examination 30 Aug 2013 Paper 1 Multiple Choice 1 hour Additional Materials: Data Booklet Optical Mark Sheet (OMS) READ THESE INSTRUCTIONS FIRST On the separate multiple choice OMS given, write your name, subject title and class in the spaces provided. Shade correctly your FIN/NRIC number. There are 40 questions in this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice using a soft pencil on the separate OMS. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. You are advised to fill in the OMS as you go along; no additional time will be given for the transfer of answers once the examination has ended. Any rough working should be done in this question paper.     This document consists of 18 printed pages and 2 blank pages.  1204

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3   Turn Over] 4 The boiling point of water (100 oC) is greater than that of ammonia (–33 oC). Which statement is a correct explanation of this? A Ammonia has intramolecular hydrogen bonds, which water does not have. B The Mr of water is greater than that in ammonia, so van der Waals’ forces are stronger in water. C There are, on average, more hydrogen bonds between water molecules than there are between ammonia molecules. D The O–H bond requires 460 kJ mol –1 to overcome, while the N–H bond only requires 390 kJ mol–1 to overcome. 5 The standard enthalpy change of for