NYGH_2024_S4SIP_Prelim_P1

Class Centre/Index Number Name Preliminary Examination 2024 Secondary 4 CHEMISTRY Paper 1 Multiple Choice 6092/01 1 hour Friday 23 August 1200 – 1300 Additional materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue, correction fluid or tape. Write your name, register number and class in the spaces at the top of this page and on the Answer Sheet in the spaces 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 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. This document consists of 17 printed pages and 3 blank pages. Setter(s): TC NANYANG GIRLS' HIGH SCHOOL [Turn over

2 1 A balloon full of helium gas was found to be smaller in size as the temperature changes from 30 oC to 10 oC. Which statement best explains why this is so? A The gas condenses into a liquid and so takes up less space. B The gas particles become smaller at lower temperatures. C The gas particles diffuse through the balloon and escape. D The gas particles move more slowly hence reducing the pressure. 2 Ethylamine gas, C2H5NH2, and hydrogen chloride gas, HCl, react together to form a white solid, ethylamine hydrochloride. At which position in the tube would a white ring of ethylamine hydrochloride be formed? 3 Substances can be elements, compounds or mixtures. Which row is correct? element compound mixture A calcium brass zinc B methane carbon crude oil C nitrogen carbon dioxide water vapour D oxygen glucose air cotton wool soaked in ethylamine solution cotton wool soaked in hydrochloric solution

3 [Turn over 4 Four mixtures, each containing two substances are shown in the table. The substances need to be separated and collected. Which row correctly matches the mixture to the separation method? mixture separation method A copper(II) sulfate and water chromatography B methanol and ethanol evaporation C oxygen and nitrogen fractional distillation D sand and silver chloride filtration 5 Two isotopes of chlorine are 35Cl and 37Cl. Using these isotopes, how many different relative molecular masses are possible for the compound with the molecular formula C2H3Cl3? A 2 B 3 C 4 D 5 6 A piece of magnesium reacts with dilute hydrochloric acid. Which statement is correct? A A covalent compound is formed during the reaction. B Each chlorine atom loses one electro