RI 2022 H2 Chem Y5 TP QP

Name: ( ) Class: 23S0____ RAFFLES INSTITUTION 2022 Year 5 Term 3 Common Test HIGHER 2 CHEMISTRY 9729 30 June 2022 2 hours 15 minutes Additional Materials: Multiple Choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Write your name, 6 -digit index number and civics tutorial group in the spaces pro vided on the OMR sheet and the cover sheet on page 17. Shade in your 6-digit exam index number on the OMR Answer 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. Your OMR Answer Sheet will be collected after the first 30 minutes. Record your answers to this section in soft pencil on the separate OMR Answer Sheet. Section B (30 marks) consists of 3 structured questions. Answer all questions. Answers to this section are to be written in the spaces provided in the question paper. Section C (35 marks) consists of 2 free-response questions. Write your answers in the spaces provided in the question paper. If additional space is required, you should use pages 29–30 at the end of the booklet for Section C. The question number must be clearly shown. The number of marks is given in brackets [ ] at the end of each question or part question. Write in dark blue or black pen. You may be subject to penalty for writing answers in pencil. Answers to Sections B and C are to be handed in separately. Question Marks B1 / 6 B2 / 8 B3 / 16 This document consists of 30 printed pages. This document is copyrighted, please do not reproduce it without permission

2 Raffles Institution 2022 9729/J/22 [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 gas contains the greatest number of atoms? A 2.80 g of nitrogen B 3.60 g of argon C 950 cm3 of C2H2 (measured at r.t.p.) D 5.10  1022 molecules of carbon dioxide 2 Chlorine reacts with hot aqueous sodium hydroxide to form chloride ions and another chlorine-containing product. When 0.03 mol of chlorine were reacted with excess sodium hydroxide, 0.05 mol of chloride ions were formed. What is the oxidation state of Cl in the other chlorine-containing product? A +1 B +3 C +5 D +7 3 Use of the Data Booklet is relevant to this question. Which statements regarding chromium are correct? 1 The electronic configuration of Cr+(g) at ground state is [Ar] 3d44s1. 2 Cr2+(g) and Cr3+(g) have the same number of paired electrons. 3 The energy required for