PJC_H2 Chemistry_2008 JC2 H2 Chemistry Prelim Paper 1 (with soln)

PIONEER JUNIOR COLLEGE JC2 PRELIMINARY EXAMINATION 2008 CHEMISTRY 9746/01 Higher 2 Paper 1 Multiple Choice 18 September 2008 1 h our Additional materials: Data Booklet Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Write your name, CT Group and index number on the answer sheet in the spaces provided unless this has already been done for you. There are forty questions in this paper. Answer all questions. For each question, there are four possible answers labelled 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 14 printed pages. [Turn Over

2 Section A For each question, there are four possible answers labelled A, B, C and D . Choose the one you consider to be correct. 1 25.0 cm 3 of 0.05 mol dm-3 KClO4(aq) required 50.0 cm3 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 one of the following formulae correctly represents the reduction product of the ClO4 - ion? A Cl- B ClO2 - C ClO3 - D OCl- 2 Which of the following is not true about P3- ion? A It is very polarisable. B It is isoelectronic with argon. C Its p-orbitals are completely filled. D It is smaller than a phosphorus atom. 3 X and Y are elements with the following successive ionisation energies in kJ mol-1. X 580 1800 2700 11600 14800 18400 23300 Y 1310 3400 5300 7500 11300 13300 20300 What is the compound that is formed from element X and Y? A XY4 B X 2Y3 C X 3Y2 D X 4Y 4 In which of the following pairs is the bond angle of the second molecule / ion greater than that of the first? A NO 2 +, NO2 - B SO 4 2-, SO3 2- C BrF 3, ClF3 D PH 3, AsH3

3 5 A 2 g sample of hy drogen 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