2022 CCHS(M) Chem Prelims P1

[Turn over Name: Class: Class Register Number: Parent’s Signature ______________________ PRELIMINARY EXAMINATION 2022 SECONDARY 4 CHEMISTRY 6092/01 Paper 1 Multiple Choice 16 September 2022 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class and register number clearly in the spaces provided at the top of this page. 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 18. The use of an approved scientific calculator is expected, where appropriate. This document consists of 18 printed pages.

2 2022 Preliminary Exam/CCHMS/Secondary 4/Chemistry/6092/01 1 Which mixture can be separated into its components by adding water, stirring and filtering? A ammonium carbonate and sodium chloride B calcium nitrate and barium chloride C iron(II) carbonate and potassium sulfate D copper and sulfur 2 The diagram below shows the reaction of an unknown substance. What is solid R? A zinc chloride B sodium carbonate C aluminium nitrate D calcium sulfate white crystalline solid R white precipitate aqueous salt white precipitate colourless solution add aqueous NaOH in excess add aqueous NaOH add water add dilute HNO3 followed by aqueous Pb(NO3)2

3 [Turn over 2022 Preliminary Exam/CCHMS/Secondary 4/Chemistry/6092/01 3 The following reactions are carried out. reaction result propanoic acid is added to ammonium carbonate gas E is given off ammonium propanoate is warmed with aqueous sodium hydroxide gas F is given off propanoic acid is added to aqueous ammonia compound G is formed in a colourless solution What are E, F and G? gas E gas F compound G A ammonia carbon dioxide ammonium carbonate B ammonia carbon dioxide ammonium propanoate C carbon dioxide ammonia ammonium carbonate D carbon dioxide ammonia ammonium propanoate 4 In which of the following substances are the particles closest to one another at 25 oC? A dilute hydrochloric acid B copper(II) oxide C ethanol D carbon monoxide

4 2022 Preliminary Exam/CCHMS/Secondary 4/Chemistry/6092/01 5 Two experimental set-ups to demonstrate the diffusion of gases are shown in the diagram below. What changes, if any, to the water levels at P and Q would you expect to see in both experiments? experiment 1 experiment 2 A P and Q