2022 4E Chemistry Schools' Prelim Exam Paper 1

A – Z School’s Preliminary Papers 4 Express Chemistry Paper 1 (6092/01) School School A Anderson Secondary School N Nanyang Girls’ High School B Beay Secondary School O Orchid Park Secondary School C Chung Cheng High School (Main) P Paya Lebar Methodist Girls’ School D Damai Secondary School Q Queensway Secondary School E Edgefield Secondary School R Riverside Secondary School F Fuhua Secondary School S Singapore Chinese Girls’ School. G Geylang Methodist School (Secondary) T Temasek Secondary School H Hillgrove Secondary School U YUying Secondary School I Holy Innocents’ High School V Victoria School J Juying Secondary School W West Spring Secondary School K CHIJ Katong Convent School X Xinmin Secondary School L Loyang View Secondary School Y Yuhua Secondary School M Montfort Secondary School Z Zhonghua Secondary School SAS Chemistr y 2 0 2 2 edition Paper 1 40 MCQ total Duration = 1 hour Marks = 40 Weighting = 30%

This document consists of 19 printed pages and 1 blank page. Setter: Mr Wong FK O ANDERSON SECONDARY SCHOOL Preliminary Examination 2022 Secondary Four Express CANDIDATE NAME: CLASS: / INDEX NUMBER: CHEMISTRY Paper 1 6092/01 22 August 2022 1 hour 0800 – 0900 h 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 Question Paper and 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 Periodic Table is printed on page 19. The use of an approved scientific calculator is expected, where appropriate. _______________________________________________________________________________

PRELIM 4E CHEM 2022 6092/01 2 1 The Rf values for the dyes P, Q, R and S, in four different solvents are shown in the table. solvent water ethanol propanone tetrachloromethane dye P 0.3 0.9 0.7 0.5 dye Q 0.0 0.8 0.6 0.2 dye R 0.5 0.7 0.6 0.1 dye S 0.0 0.6 0.4 0.2 Which solvent could be used to separate a mixture of all the four dyes? A ethanol B propanone C tetrachloromethane D water 2 The diagram below shows an apparatus that can be used to obtain a stream of nitrogen from air. Using this apparatus, which set of substances labelled X, Y and Z gives the purest sample of nitrogen? X Y Z A B C D aqueous calcium hydroxide concentrated sulfuric acid sodium hydroxide solution concentrated sulfuric acid calcium chloride solution aqueous calcium hydroxide concentrated sulfuric acid sodium hydroxide solution sulfur carbon copper carbon

PRELIM 4E CHEM 2022 6092/01 3 3 The information on two substances P and Q are given below. substance P Q arrangement of particles close and not orderly regularly arranged and very close movement of particles sliding around randomly vibrating about their fixed positions Four substances are given below. substance description 1 copper at 100 C 2 ethanol at 25 C 3 oxygen at 10 C 4 water at 200 C Which row shows substances P and Q? P Q A 1 2 B 2 1 C 3 4 D 4 1 4 A student conducted an experiment to determine how much hydrochloric acid is exactly required to neutralise 25.0 cm3 of aqueous potassium hydroxide. Without the use of an indicator, which piece of apparatus does he require to determine the end-point of the reaction? A electronic balance B gas syringe C stopwatch D thermometer

PRELIM 4E CHEM 2022 6092/01 4 5 A student prepared an ester by heating ethanoic acid and ethanol for thirty minutes. Which apparatus is most suitable for the student to separate the ester formed from the reaction mixture at the end of the reaction? 6 A newly discovered element, Preliminarium (Pm) has a proton number of 123 and a nucleon number of 248. Which row shows the correct number of sub-atomic particles in a Preliminarium ion, Pm3+? number of electrons number of neutrons number of protons A 120 120 123 B 120 123 120 C 120 125 123 D 123 125 120

PRELIM 4E CHEM 2022 6092/01 5 7 Element M exists as 3 stable isotopes and has a relative atomic mass of 65.0. Which row shows the correct compositions of isotopes? 64M 66M 67M A B C D 32.1% 54.6% 56.3% 53.3% 56.4% 6.6% 31.1% 25.5% 11.5% 38.8% 12.6% 21.2% 8 Four balloons W, X, Y and Z, were inflated to the same size with four different gases: argon, chlorine, carbon dioxide and ammonia. After several hours, all four balloons became smaller. What is the correct order of balloon size? largest → smallest A B C D X X W Z Y W Z W W Y Y Y Z Z X X

PRELIM 4E CHEM 2022 6092/01 6 9 The formula of an ionic compound, containing elements J, K and L is shown below. The letters J, K and L are not the chemical symbols of the elements. Which statements are correct? 1 Element K belongs to Group V of the Periodic Table. 2 Element J could be magnesium. 3 Element K and element L are bonded together by covalent bond. 4 Element L is a metal. A 1 and 2 only B 1, 2 and 3 only C 3 and 4 only D 2, 3 and 4 only J 2+ K L 2-

PRELIM 4E CHEM 2022 6092/01 7 The structures of four substances P, Q, R and S at room conditions, are represented as follows. Use the structures to answer questions 10, 11 and 12. 10 Which statement about the four substances is not correct? A All the substances are pure. B All the substances are solids at room conditions. C One of the substances is an element. D Substance Q has a simple molecular structure. 11 Which property describes substance P correctly? A low melting point B hard C poor electrical conductivity in all states D soluble in organic solvent 12 Which row shows the correct identities for the four substances P, Q, R and S? P Q R S A brass dry ice diamond calcium oxide B calcium oxide iodine sand brass C sand poly(ethene) sodium chloride iodine D sodium chloride oxygen poly(ethene) brass

PRELIM 4E CHEM 2022 6092/01 8 13 Element R reacts with water producing a solution which turns red litmus paper to blue. The solution also reacts with dilute sulfuric acid to form a colourless liquid. In which group or section of the Periodic Table is R found? A Group I B Group VII C Group 0 D transition metals 14 A student is given five reagents as shown below to make salts. dilute hydrochloric acid dilute sulfuric acid dilute nitric acid solid lead(II) oxide solid copper(II) oxide How many soluble salts can be prepared? A 3 B 4 C 5 D 6 15 Study the reaction shown below. 2KMnO4(aq) + 5SO2(g) + 2H2O(l) → K2SO4(aq) + 2MnSO4(aq) + 2H2SO4(aq) Which pair of oxidising and reducing agents is correct? oxidising agent reducing agent A H2SO4 MnSO4 B KMnO4 H2O C KMnO4 SO2 D SO2 KMnO4

PRELIM 4E CHEM 2022 6092/01 9 16 Which row correctly shows the salts that are prepared by each method? titration precipitation adding excess solid reactants A ammonium nitrate lead(II) sulfate sodium chloride B calcium carbonate calcium sulfate calcium chloride C copper(II) sulfate ammonium chloride lead(II) nitrate D potassium sulfate silver chloride zinc sulfate 17 Pentane can be converted into carbon dioxide and water in the following stages: 1 2 3 C5H12