Pasir-Ris-Secondary-Sec-3-Science-Chemistry-EOY-2021

Pasir Ris Secondary Schoo! Name Class Register Number SECONDARY 3 EXPRESS END OF YEAR EXAMINATION 2021 sclENcE (cHEMISTRY) Paper 1 Multiple Choice Wednesday 0800 - 0930 Candidates answer on the Question Paper No Additional Materials are required. 13 oci2021 Papers 'l and 2: t hour 30 minutes 70 marks READ THESE INSTRUCTIONS FIRST Write your name, class and register number on all the work you hand in. Write in dark blue or black pen. Do not use staples, paper clips, glue or conection fluid. There are ten 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 conect and record your choice in the boxes provided on page /t Each conect answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this paper. A copy of the Periodic Table is printed on page 12 of Paper 2. The use of an approved scientific calculator is expected, where appropriate. This document consists of 4 printed pages, including the cover page Setter: Ms Chua Wei Tian PartnerlnLearning 147 flurn over BP- 148 @ You are advised to spend no more than 15 minutes on Paper'1. You may proceed to answer Paper 2 as soon as you have completed Paper 1. At the end of the examination, submit your answers to Paper 1 and Paper 2 separately.

,| pRss-2oz r-Eov-s3 E -s c t (c H E B-P1' 1 49 Rock salt is a mixture of sand and sodium chloride. Sodium chloride is soluble in water but not in alcohol. Sand is insoluble in both water and alcohol. What is required to separate sand from the sodium chloride? 1 alcohol 2 filter paper 3 fractionating column 4 water B D A c 1and3 2and3 1and4 2and4 2 2.OO g of powdered calcium carbonate is added to 49.00 cm3 of dilute hydrochloric acid. which apparatus is best used to measure the calcium carbonate and dilute hydrochloric acid? calcium carbonate A B G D beaker beaker mass balance mass balance burette pipetle bu rette pipette Four coloured dyes are separated using chromatography. which chromatogram shows a dye which contains an insoluble component? ABCD baseline 4 Period 3 of the Periodic Table is shown. Na Mg AI Si P S ct Ar Which characteristic of the elements increases from Na to Ar across Period 3? 3 B D A c density non-metallic charac,ter melting point number of electron shells PartnerlnLeaming 148 t tt t t I tt t t t L- t' 2 hydrochloric acid

5 PRss-202r-EoY-s3E-sc(cHEEP' 1 5 0 An element Y reacts with orygen to form an ionic compound with the formula Y2O3. Which group of the Periodic Table is element Y found in? B D A c Group tr Group V Group III Group VII KandM L only H.(aq) + oH-(aq) ---+ Hzo(/) Nat(aq) + OH-(aq) ---r NaOH(aq) 6 Lead(tl) oxide is an amphoteric oxide. Which statement about lead(Il) oxide is conect? It will not react with hydrochloric acid but will react with sodium hydroxide, It will not react with hydrochloric acid or sodium hydroxide. It will react with hydrochloric acid and sodium hydroxide. It will re