2022 CHIJ Chem Prelims P1

CHIJSec/2022/OLevelPrelim/6092/01 [Turn over CONVENT OF THE HOLY INFANT JESUS SECONDARY Preliminary Examination in preparation for the General Certificate of Education Ordinary Level 2022 CANDIDATE NAME CLASS REGISTER NUMBER CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 6092/01 14 September 2022 1 hour 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 on the Multiple Choice Answer Sheet provided. 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 on the question paper. A copy of the Periodic Table is printed on page 16. The use of an approved scientific calculator is expected, where appropriate. This document consists of 15 printed pages and 1 blank page. ���

2 CHIJSec/2022/OLevelMY/6092/01 1 One of the instructions for an experiment reads as follows. Quickly add 50 cm3 of acid. What is the best piece of apparatus to use? A a burette B a conical flask C a measuring cylinder D a pipette 2 You have been given a liquid mixture of benzene (C6H6) and a dilute solution of sodium chloride in water. Benzene boils at 80 °C. Which method should be used in the respective sequence to obtain samples of benzene and sodium chloride crystals? first method second method A filtration crystallisation B use a separating funnel evaporation C distillation filtration D evaporation sublimation 3 Oxygen was prepared from hydrogen peroxide and collected as shown in the diagram. 2H2O2 2H2O + O2 The first few tubes of gas were rejected because the gas was contaminated by A water vapour. B hydrogen peroxide. C hydrogen. D nitrogen. aqueous hydrogen peroxide oxygen water manganese(IV) oxide ���

3 [Turn over CHIJSec/2022/OLevelMY/6092/01 4 What is the best method to separate a mixture of sodium chloride crystals and iodine crystals? A sublimation B fractional distillation C filtration D crystallisation 5 An aqueous solution of zinc sulfate is tested by adding reagents. Which observation is correct? reagent added to zinc sulfate observations A acidified aqueous barium nitrate forms a yellow precipitate B aqueous ammonia forms white precipitate, insoluble in excess of the reagent C aqueous sodium hydroxide forms a whit