RI 2024 Y5 H2 Chem TP QP

This document consists of 31 printed pages and 1 blank page. RAFFLES INSTITUTION 2024 YEAR 5 TERM 3 TIMED PRACTICE Higher 2 CHEMISTRY 9729 2 July 2024 2 hours 15 minutes Additional Materials: Multiple Choice Answer (OMR) Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Write your name, 6-digit exam index number and civics tutorial group in the spaces provided on the OMR sheet and the cover sheet on page 7. Shade your 6-digit exam index number on the OMR sheet. This paper consists of three sections, A, B and C. Section A (15 marks) consists of 15 multiple-choice questions. Answer this section first. The OMR sheet will be collected after the first 30 minutes. 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 OMR sheet. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in the question paper. Section B (30 marks) consists of 3 structured questions. Answer all questions in the spaces provided in the question paper. If additional space is required, you should use the pages at the end of the booklet (pages 30 – 32). The question number must be clearly shown. Section C (35 marks) consists of 2 free-response questions. Answer all questions in the spaces provided in the question paper. If additional space is required, you should use the pages at the end of the booklet (pages 30 – 32). The question number must be clearly shown. 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. The use of an approved scientific calculator is expected, where appropriate. The number of marks is given in brackets [ ] at the end of each question or part question. This document is copyrighted, please do not reproduce it without permission

2 © Raffles Institution 2024 9729/J/24 [Turn Over Section A (15 marks) For each question there are four possible answers, A, B, C, and D. Choose the one you consider to be correct. 1 Use of the Data Booklet is relevant to this question. Which of the following contains the same number of atoms or ions as there are atoms in 0.2 g of oxygen gas? A 0.225 g of water C 0.300 dm3 of neon gas at r.t.p. B 1.275 g of aluminium oxide D 0.284 dm3 of nitrogen gas at s.t.p. 2 Tin(II) ions can be oxidised to tin(IV) ions by iodate(V) ions, IO3−. The equation for the oxidation is shown below. Sn2+ → Sn4+ + 2e− In an experiment, 25.0 cm 3 of 0.0250 mol dm −3 IO