NYGH 2010-S3EOY-Chem P2

Class Register Number Name 南洋女子中学校 NANYANG GIRLS’ HIGH SCHOOL End-of-Year Examination 2010 Secondary Three CHEMISTRY 1 hour 45 minutes Paper 2 Theory Paper 09 15 – 11 00 Friday 15 October 2010 Additional materials: Writing papers READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to do so. Write your name, register number and class in the spaces at the top of this page and on any separate answer paper used. Section A (40 marks) Answer all questions. Write your answers in the spaces provided on the question paper. Section B (30 marks) Answer all questions including questions 9, 10 and 11 Either or 11 Or. Write your answers on the separate writing paper provided. At the end of the examination, 1. Hand in Section A and Section B separately; 2. Write an E (for Either) or an O (for Or) next to the number 11 in the grid below to indicate which question you have answered. INFORMATION FOR CANDIDATES Examiner’s Use Section A Section B 9 10 11 Total The intended number of marks is given in the brackets [ ] at the end of each question or part question. You are advised to spend no longer than one hour on Section A and no longer than 45 minutes on Section B. You are allowed to use an approved scientific calculator. Setters: LSC and ET This document consists of 14 printed pages. NANYANG GIRLS’ HIGH SCHOOL [Turn over

2010 End-of-Year Examination Secondary Three 2 Nanyang Girls’ High School Section A Answer all questions. Write your answers in the spaces provided. A1 (a) What are the differences in the arr angement and motion of the particles in a solid as compared to that in a gas? Give a reason for these differences. [2] (b) A certain gas X , has a relative molecular mass of 64. Another gas, Y has a relative molecular mass of 28. Both ar e at the same tem perature. Are the particles in the two gases moving at the same speed? Explain your reasoning. [2] [Total:4] A2 (a) The figure below shows an experiment to find the boiling point of a liquid Z. (i) Would this method be suitable for fi nding the boiling point of a volatile liquid? Explain your answer. [2] liquid Z boiling stones round bottomed flask Setters: LSC and ET Chemistry /II

2010 End- of-Year Examination Secondary Three 3 Nanyang Girls’ High School ( i i ) The thermometer showed a constant reading at 70 oC and then again at 120oC. What conclusion can you draw from this observation? [1] (b) The colouring in a fizzy drink was extr acted by a solvent. Two drops of the solution were placed at the centre of a circular filter paper and allowed to dry. Drops of pure solvent were slowly added to the centre of the filter paper. After some time, f