2022 HYSS Chem Prelims P1

Name: Index Number: Class: HUA YI SECONDARY SCHOOL Preliminary Examination CHEMISTRY Paper 1 16 September 2022 1 hour Candidates answer on the Multiple Choice Answer Sheet Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write your Name, Index Number and Class on all the work you have done. Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. There are forty 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. A copy of the Periodic Table is printed on page 20. For Examiner’s Use Paper 1 This document consists of 20 printed pages including the cover page. © HYSS 2022 No part of this document may be reproduced in any form or transmitted in any form or by any means without the prior permission of Hua Yi Secondary School. [Turn Over 4E 4E 6092/1 Setter: Ms Tok Peilin

2 2022 4E Pure Chemistry Preliminary P1 Hua Yi Secondary School 1 A gas turns moist red litmus blue, is soluble in water and is less dense than air. Which diagram shows a correct way of drying and collecting the gas? A B C D gas gas calcium oxide water gas gas calcium oxide concentrated sulfuric acid

3 2022 4E Pure Chemistry Preliminary P1 Hua Yi Secondary School 2 The apparatus shown is commonly used to oxidise ethanol to ethanoic acid. Which is the purpose of the condenser? A prevents air from oxidising ethanoic acid formed B prevents ethanoic acid from reforming back to ethanol C prevents ethanol from being converted to ethene D prevents the escape of any unreacted ethanol 3 Ethyl acetate is an organic compound that is insoluble in water. Given a mixture of e thyl acetate and aqueous copper(II) sulfate at room temperature, which two steps should be carried out to obtain samples of ethyl acetate and copper(II) sul