PJC H2 Chem 2013 Prelim P1 QP _ Soln

PIONEER JUNIOR COLLEGE JC2 PRELIMINARY EXAMINATION HIGHER 2 CHEMISTRY 9647/01 Paper 1 Multiple Choice 27 September 2013 1 hour Additional Materials: Multiple Choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, Centre number and index number on the Answer Sheet in the spaces provided unless this has been done for you. There are forty questions on 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 16 printed pages. Name: Index No.: CT Group: 12 Name: Index No.: 947

2 © PJC 2013 9647/01/JC2 PRELIM/2013 Section A For each question, there are f our possible answers labelled A, B, C and D. Choose the one you consider to be correct. 1 Carbon disulfide, CS 2, is a volatile flammable liquid used in the manufacture of cellophane. On combustion, CS 2 is oxidised as follows. CS2(g) + 3O2(g) → CO2(g) + 2SO2(g) A 20 cm 3 sample of carbon disulf ide is ignited with 100 cm 3 of oxygen. The final volume of gas after burning is treated with an excess of aqueous alkali. What percentage of this final volume remains after treatment with the alkali? A 20% B 40% C 60% D 80% 2 25.0 cm 3 of 0.05 mol dm3 KClO4(aq) required 50.0 cm 3 of 0.20 mol dm3 TiCl3 (aq) to reach end-point. Given that titanium( III) is oxidised to titanium( IV) in this reaction, which of the following formulae correctly represents the reduction product of the ClO 4 - ion? A Cl B ClO2  C ClO3  D OCl 3 The successive ionisation energies, in kJ mol1, of an element X are given below. 870 1800 3000 3600 5800 7000 13200 Which of the following can be inferred from the data provided? A X has no unpaired valence electrons in its atomic structure. B X has a lower first ionisation energy than the element preceding it in the Periodic Table. C X is likely to form an ionic compound with a non-metallic element. D X would achieve noble gas configuratio n after removing all its first seven electrons. 948

3 © PJC 2013 9647/01/JC2 PRELIM/2013 4 A 2 g sample of hydrogen at temperature T and of volume V exerts a pressure p. Deuterium, H2 1 , is an isotope of hydrogen. Which of the following would also exert a pressure of p at the same temperature T? A a mixture of 1 g of hydrogen and 1 g of deuterium of total volume V B a mixture of 1 g of hydrogen and 2 g of deuterium of total volume 2V C a mixt