2022 MI H2 Chem Prelim Paper 1 - Answer

Class Adm No Candidate Name: This question paper consists of 14 printed pages and 2 blank pages. 2022 Preliminary Examination Pre-University 3 H2 CHEMISTRY 9729/01 Paper 1 Multiple Choice 21st Sep 2022 1 hour Additional materials: Multiple Choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Do not turn over this question paper until you are told to do so Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class and admission number in the spaces provided at the top of this page and on the Multiple Choice Answer Sheet provided. 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 Multiple Choice Answer Sheet provided. Read the instructions on the Multiple Choice 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 question paper. The use of an approved scientific calculator is expected, where appropriate. FOR EXAMINER’S USE TOTAL (30 marks)

2 1 D 7 D 13 C 19 A 25 D 2 D 8 B 14 D 20 C 26 D 3 B 9 C 15 D 21 A 27 C 4 B 10 C 16 C 22 C 28 B 5 C 11 C 17 B 23 A 29 D 6 A 12 B 18 A 24 D 30 D

3 [Turn over For each question there are four possible answers, A, B, C, and D. Choose the one you consider to be correct. 1 Which of the following conversions have a percentage yield of 73%? 1 74 g of butan-1-ol (Mr = 74.0) → 52.56 g of butanal (Mr = 72.0) 2 72 g of butanone (Mr = 72.0) → 54.02 g of butan-2-ol (Mr = 74.0) 3 56 g of but-2-ene (Mr = 56.0) → 87.60 g of ethanoic acid (Mr = 60.0) A 1 only B 1 and 2 only C 2 and 3 only D 1, 2 and 3 2 Ferric oxalate, Fe2(C2O4)3, is an ionic salt. A sample of 10.0 cm3 of 0.100 mol dm-3 ferric oxalate is titrated against 0.100 mol dm-3 acidified KMnO4. What is the volume of KMnO4 required to reach end point, and the total volume of CO2 gas evolved at r.t.p.? volume of KMnO4 volume of gas A 4.0 cm3 72 cm3 B 4.0 cm3 144 cm3 C 12.0 cm3 72 cm3 D 12.0 cm3 144 cm3 3 Use of the Data Booklet is relevant to this question. The silver chloride electrode is a type of reference electrode commonly used in electrochemical measurements. It can be represented as below. AgCl(s) + e– ⇌ Ag(s) + Cl–(aq) The reduction potential of the Co3+/Co2+ half-cell is +1.69 V when it is measured using the AgCl /Ag reference electrode at standard conditions. What is the reduction potential of the AgCl /Ag electrode when it is measured against the standard hydrogen electrode as