Dunman (2024) 4E 6092 Prelim P1

This document consists of 17 printed pages and 1 blank page. DUNMAN SECONDARY SCHOOL CANDIDATE NAME CLASS INDEX NUMBER PRELIMINARY EXAMINATION 2024 SECONDARY 4 EXPRESS CHEMISTRY 6092/01 Paper 1 16 August 2024 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 index number 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 18. The use of an approved scientific calculator is expected, where appropriate.

2 6092/01/Prelim/4Exp/2024 1 A student investigates the rate of reaction between an excess of acid of different concentrations and known quantity of calcium carbonate granules. During the reaction, the student measures the volume of gas released. In addition to a conical flask and a balance, the following pieces of apparatus are available. 1 gas syringe 2 thermometer 3 measuring cylinder 4 stopwatch Which pieces of apparatus are needed for this experiment? A 1, 3 and 4 only B 1 and 3 only C 1 and 4 only D 2, 3 and 4 only 2 The diagram shows an experimental setup to produce and collect a dry sample of gas X. What is gas X? A ammonia gas B hydrogen chloride gas C hydrogen gas D steam gas X concentrated sulfuric acid

3 6092/01/Prelim/4Exp/2024 3 Aluminium sulfate is used in water treatment. Aqueous aluminium sulfate is acidic. The table shows the results of tests on four different samples of treated water. To which sample had an excess of aluminium sulfate been added? pH of sample reaction with an excess aqueous ammonia A 3 white precipitate B 3 no reaction C 11 no reaction D 11 white precipitate 4 The diagrams show an experiment with aqueous ammonium chloride. A gas, Y, is produced and the litmus paper changes colour. What are solution X and gas Y? solution X gas Y A aqueous sodium hydroxide ammonia B aqueous sodium hydroxide chlorine C dilute sulfuric acid ammonia D dilute sulfuric acid chlorine poured in moist litmus paper mixture heat aqueous ammonium chloride

4 6092/01/Prelim/4Exp/2024 5 The cover plate is removed from the gas jars shown in the diagram. After several days, the colour of the gas is the same in both jars. Which statement explains this change? A Equa