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