2022 SACSS Chem Prelims P1

1 [Turn over Name: Index Number: Class: ST. ANTHONY'S CANOSSIAN SECONDARY SCHOOL Preliminary Examination 2022 Secondary 4 Express CHEMISTRY 6092/01 Paper 1 15 September 2022 Setter: MRS ESTHER BOO 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, index number and class on the Answer Sheet in the spaces provided unless this has been done for you. 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 The use of an approved scientific calculator is expected, where appropriate. 40 Parent’s signature: This document consists of 20 printed pages ���

2 [Turn over 1 A student plans two experiments. Experiment 1: find the concentration of a solution of sodium hydroxide by titration with dilute hydrochloric acid. Experiment 2: find the rate of the reaction between pieces of calcium carbonate and dilute hydrochloric acid by measuring the volume of gas given off every minute. What apparatus is needed for both experiments? experiment 1 experiment 2 A electronic balance, measuring cylinder, thermometer gas syringe, stopwatch B burette, pipette electronic balance, measuring cylinder, thermometer C burette, pipette gas syringe, stopwatch D gas syringe, stopwatch burette, pipette 2 The solubility curves of three salts are shown. Which salt(s) cannot be prepared by crystallisation? A W only B Y only C W and X D X and Y temperature/ oC solubility /gcm-3 salt X salt Y salt W ���

3 [Turn over 3 Which test is used to show that a sample of water is pure? A evaporate the water to see if there is any solid left behind B heat the water to check its boiling point C test with anhydrous cobalt(II) chloride D use universal indicator paper to check its pH 4 The flow chart below shows some reactions that blue solution W undergoes. What are the identities of W, X, Y and Z? W X Y Z A Cu(NO3)2 NaNO3 Cu(OH)2 CuSO4 B CuSO4 Na2SO4 Cu(OH)2 CuSO