ACJC Prelim P3_QP

ANGLO-CHINESE JUNIOR COLLEGE DEPARTMENT OF CHEMISTRY Preliminary Examination CHEMISTRY 9729/03 Higher 2 Paper 3 Free Response 24 August 2018 Candidates answer on separate paper. 2 hours Additional Materials: Writing Paper Data Booklet Cover Page READ THESE INSTRUCTIONS FIRST Write your index number and name, form class and tutorial class on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Section A Answer all questions. Section B Answer one question. Start each question on a new sheet of writing paper. A Data Booklet is provided. The use of an approved calculator is expected, where appropriate. You are reminded of the need for good English and clear presentation in your answers. At the end of the examination, fasten all your work securely behind a cover sheet. The number of marks is given in brackets [ ] at the end of each question or part question. This document consists of 15 printed pages and 1 blank page. 9729/03/Prelim/18 ANGLO-CHINESE JUNIOR COLLEGE © ACJC 2018 Department of Chemistry [Turn over

2 © ACJC 2018 9729/03/Prelim/2018 [Turn over BLANK PAGE

3 © ACJC 2018 9729/03/Prelim/2018 [Turn over Section A Answer all questions in this section. 1 (a) (i) Due to reactivity of A lCl3 and PCl5 in water, the following reactions are carried out under anhydrous conditions. Write equations showing the reactions of aluminium chloride and phosphorus pentachloride in water. State the pH of resulting solutions. [3] (ii) Chlorobenzene and 2-chloro-2-methylbutane are separately boiled with aqueous sodium hydroxide and acidified with nitric acid before aqueous silver nitrate is added. State and explain the difference in observations. Write equations for the reactions that occur. [3]

4 © ACJC 2018 9729/03/Prelim/2018 [Turn over (b) To study the kinetics of