NYGH 2021-S3EOY-IP Chem P1

Class Register Number Name End-of-Year Examination 2021 Secondary 3 IP CHEMISTRY Paper 1 Multiple Choice 45 minutes Wednesday 6 October 1130 – 1215 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 thirty 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 13. The use of approved scientific calculators is expected, where appropriate. This document consists of 13 printed pages and 1 blank page. Setter(s): FKD/JK NANYANG GIRLS' HIGH SCHOOL [Turn over

2 Setters: FKD/JK Chemistry Paper 1 1 The diagrams show the particles in substance M at two different temperatures. ‒46°C 110°C What could be the melting point and boiling point of substance M? melting point / °C boiling point / °C A ‒40 130 B ‒35 80 C ‒60 100 D ‒70 140 2 The diagram shows an experiment involving two gases, P and Q, contained in inverted beakers. You may assume that the effect caused by the solubility of the gases in water is negligible. Which combination of gases would cause the level at X to decrease? gas P gas Q A carbon dioxide helium B carbon monoxide nitrogen C ammonia nitrogen dioxide D chlorine methane gas P gas Q air air porous pots tube filled with water X

3 Setters: FKD/JK Chemistry Paper 1 [Turn Over 3 An experiment was carried out to measure the amount of heat produced in the reaction of hydrochloric acid with potassium hydroxide. The result was presented in the following graph. Which pair of apparatus was used to measure the variables shown on the graph? independent variable dependent variable A burette thermometer B thermometer burette C pipette thermometer D thermometer pipette 4 The set up below was used by a student to prepare pure, dry sulfur dioxide gas in the laboratory according to the reaction below. Na2SO3(s) + 2HCl(aq)→ 2NaCl(aq) + H2O(l) + SO2(g) What change needs to be made for the gas to be collected successfully? A Collect the gas using displacement of water instead. B Collect the gas using upward delivery instead. C Remove the conical flask filled with water. D Replace concentrated sulfuric acid with con