Broadrick Prelim P1

1 6092/1/8/24 Name Class Index Number BROADRICK SECONDARY SCHOOL SECONDARY 4 EXPRESS PRELIMINARY EXAMINATION 2024 CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 6092/01 August 2024 1 hour 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 OTAS answer sheet. There are forty questions in 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 Multiple Choice answer sheet. 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. The use of an approved scientific calculator is expected, where appropriate. A copy of the Periodic Table is printed on page 14. This document consists of 14 printed pages including this page For Examiner’s Use 40

2 [Turn Over 6092/1/8/24 1 Which apparatus is not required in titration experiments? A burette B conical flask C measuring cylinder D white tile 2 Which conditions will give the highest rate of diffusion of a gas? relative molecular mass of gas temperature A high low B high high C low low D low high 3 Butyl ethanoate and water are two immiscible liquids with similar boiling points. Which method is most suitable to separate a mixture of water and butyl ethanoate? A evaporation to dryness B filtration C simple distillation D use a separating funnel

3 [Turn Over 6092/1/8/24 4 A paper chromatography experiment is used to find the Rf value for Fe2+(aq). The chromatogram is shown. To make the spot containing Fe2+(aq) more visible, the paper is sprayed with a locating agent that forms a precipitate of iron(II) hydroxide on the spot. In the chromatogram, the Rf of Fe2+(aq) is given by ….1…. and the colour of the precipitate is ….2…. . gap 1 gap 2 A 0.42 red-brown B 0.45 green C 0.50 red-brown D 0.55 green 5 Which technique is involved in all of the following processes? 1 obtaining copper(II) sulfate crystals from aqueous copper(II) sulfate 2 obtaining ethanol from the fermentation of glucose 3 obtaining nitrogen from liquid air A crystallisation B evaporation C filtration D fractional distillation solvent front Fe2+ 110 mm 20 mm start line 100 mm 55 mm

4 [Turn Over 6092/1/8/24 6 During a change in physical state at constant temperature and pressure:  average distance between the particles has a small change,  energy is released as stronger forces of attraction form between the particles. Which change of state is being described? A gas to solid B gas to liquid C liquid to solid D solid to l