ACJC Prelim P1_QP

1 © ACJC 2018 9729/01/Prelim/2018 [Turn over ANGLO-CHINESE JUNIOR COLLEGE DEPARTMENT OF CHEMISTRY Preliminary Examination C H E M I S T R Y 9729/01 Higher 2 Paper 1 Multiple Choice 29 August 2018 1 hour Additional Materials: Multiple Choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, index number and tutorial class on t he Answer Sheet in the spaces provided unless this has been done for you. There are thirty 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. The use of an approved scientific calculator is expected, where appropriate. This document consists of 18 printed pages. 9729/01/Prelim/18 ANGLO-CHINESE JUNIOR COLLEGE © ACJC 2018 Department of Chemistry [Turn over

2 © ACJC 2018 9729/01/Prelim/2018 [Turn over 1 The Basic Oxygen steel-making process is a method of preparing steel from carbon-rich molten pig iron. The process is basic because chemical bases are added to remove impurities. One such impurity is phosphorus pentoxide, P 4O10. Calcium oxide, CaO, is added to remove it and the only product of the reaction is the salt, calcium phosphate, Ca3(PO4)2. How many moles of CaO reacted with one mole of P4O10 in this reaction? A 1 B 1.5 C 3 D 6 2 Two moles of an oxidising agent, XO4− in the presence of excess acid oxidised 96 dm3 of nitrogen dioxide gas at room temperature and pressure to NO3−. What is the number of moles of electrons accepted by one mole of XO4−? A 1 B 2 C 3 D 4 3 Use of the Data Booklet is relevant to this question. The ion T+ contains 28 electrons and 35 neutrons. Which of the following statements about T+ or T is correct? A T and Ga3+ are isoelectronic species. B The elemental form of T can be oxidised by chlorine. C The electronic configuration of T+ ion is 1s2 2s2 2p6 3s2 3p6 3d9 4s1. D The angle of deflection of 27Al3+ is approximately three times that of T+ in an electric field. 4 Which of the following species has a different bond angle from the rest? A ICl3 B SF3+ C ClO3– D N2H4

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