PJC_H2_CHEM_P1_(With Answers)

PIONEER JUNIOR COLLEGE JC2 PRELIMINARY EXAMINATION HIGHER 2 CANDIDATE NAME CT INDEX GROUP NUMBER CHEMISTRY 9647/01 Paper 1 Multiple Choice 26 September 2014 1 hour Additional Materials: Multiple Choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Write your name, CT group and index number in the spaces at the top of this page and on the Answer Sheet in the spaces provided. Do not use staples, paper clips, highlighters, glue or correction fluid. There are forty 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 in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. This document consists of 17 printed pages. 1 3

2 © PJC 2014 9647/01/JC2 Prelim/2014 Section A For each question, there ar e four possible answers labelled A, B, C and D. Choose the one you consider to be correct. 1 Use of the Data Booklet is relevant to this question. How many molecules are present in 1 cm3 of methane gas under room conditions? A 1 x 24000 6.02 x 1023 B 1 x 6.02 x 1023 24000 C 6.02 x 1023 x 24000 1 x 1000 D 1 x 6.02 x 1023 x 16 2 Use of the Data Booklet is relevant to this question. Sodium percarbonate, (Na 2CO3)x.y(H2O2), is an oxidising agent in some home and laundry cleaning products. 5.0 cm 3 of 0.200 mol dm 3 sodium percarbonate releases 48.0 cm 3 of carbon dioxide at room conditions on reaction with excess hydrochloric acid. An identical sample, on titration with 0.100 mol dm 3 acidified KMnO4, requires 12.0 cm3 before the first pink colour appears. What is the ratio x : y? A 1 : 3 B 2 : 3 C 3 : 2 D 4 : 3 3 When iron is reacted with aqueous iron(III) ions, iron(II) ions are formed. Assuming the reaction goes to completion, how many moles of Fe and Fe 3+(aq) would result in a solution containing only Fe 2+(aq) once the reaction had taken place? No. of moles of Fe No. of moles of Fe3+(aq) A 1 2 B 1 3 C 1 5 D 2 3

3 © PJC 2014 9647/01/JC2 Prelim/2014 4 Use of the Data Booklet is relevant to this question. What do the ions 36S2 and 37Cl have in common? A Both ions have an outer electronic configuration 2s2 2p6. B Both ions have more electrons than neutrons. C Both ions have 20 neutrons in their nuclei. D Both ions contain the same number of nucleons in their nuclei. 5 The shapes of three species, E, F and G are bent, square planar and T -shaped respectively. What could E, F and G be? E F G A CS2 BrF4  BH3 B NO2 XeF4 BrCl3 C H2