NYGH 2016-S3EOY-IP Chem P1

Class Register Number Name NANYANG GIRLS’ HIGH SCHOOL End-of-Year Examination 2016 Secondary Three Chemistry Paper 1 Multiple Choice 45 minutes Wednesday 5 October 2016 0845-0930 Additional materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to do so. Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and register number on the Multiple Choice Answer Sheet provided. There are thirty questions in 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 Multiple Choice Answer Sheet. INFORMATION FOR CANDIDATES 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. The use of approved scientific calculators is allowed. A copy of the periodic table is found on page 11. Setters: KXY This document consists of 11 printed pages and 1 blank page. NANYANG GIRLS’ HIGH SCHOOL [Turn over]

2016 End-of-Year Examination Secondary Three 2 Nanyang Girls’ High School Setters: KXY Chemistry [Turn Over] 1 When a balloon filled with helium gas is left alone for a few days, it no longer floats in the air but s inks to the floor and look s deflated. Which of the following best explains this phenomenon? A Air diffused into the balloon. B Helium gas became denser than air. C Helium gas diffused out of the balloon. D Helium gas diffused out of the balloon faster than air diffused in. 2 Buckminsterfullerene, C60, sublimes at 600°C. Below is a temperature against time graph when buckminsterfullerene is cooled from 1000°C to 25°C. Which of the following options best describes the movement of the particles from Y to Z? A Carbon atoms are sliding past one another. B Carbon molecules are sliding past one another. C Carbon atoms are vibrating in fixed positions. D Carbon molecules are vibrating in fixed positions 3 The following table gives some information on substance X and Y: substance melting point / °C boiling point / °C density / g cm-1 solubility in water X 40.5 181.7 1.07 soluble Y −38.8 674.11 2.65 insoluble Which one of the following method is most suitable for separating a mixture of X and Y at room temperature? A decantation B filtration C separating funnel D simple distillation Time / s

2016 End-of-Year Examination Secondary Three 3 Nanyang Girls’ High School Setters: KXY Chemistry [Turn Over] 4 Which of the following properties is separation by paper chromatography based on? A colours B densities C boiling points D solubilities in the same solvent 5 An accident occurred in a factory and some nitric acid was spilled. Which substa