NYGH 2015-S3EOY-IP Chem P1

Class Register Number Name 南洋女子中学校 NANYANG GIRLS’ HIGH SCHOOL End-of-Year Examination 2015 Secondary Three Chemistry Paper 1 Multiple Choice 45 minutes Wednesday 7 October 2015 0800-0845 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 9. Setters: LSC This document consists of 9 printed pages. NANYANG GIRLS’ HIGH SCHOOL [Turn over]

2015 End-of-Year Examination Secondary Three 2 Nanyang Girls’ High School Setters: LSC Chemistry [Turn Over] 1 The atmosphere of Venus contains mainly oxygen, argon and nitrogen. The melting and boiling points of these gases are shown in the table below. gas melting point/oC boiling point/oC oxygen -219 -183 argon -189 -186 nitrogen -210 -196 If only liquid oxygen is to be obtained, while the other gases may remain in the solid or gaseous states, what temperature should the sample of air be decreased to? A -180oC B -185oC C -187oC D -198oC 2 Which statements are correct about a gas? I Its particles move at a low speed. II It is easily compressed. III It has a higher rate of diffusion compared to a liquid. IV Its particles spread throughout the container. A I and II only C II and IV only B II, III and IV only D I, II, III and IV 3 When a sample of impure naphthalene was heated, the sample was found to melt over a temperature range of 69oC to 76oC. What could be the melting point of naphthalene? A 69oC C 76oC B 72oC D 80oC 4 Which of the following shows the correct order of processes that should be carried out to obtain solid iodine, sand and sodium chloride from a mixture of these three solids? A evaporation, sublimation, dissolving, filtration B sublimation, dissolving, filtration, evaporation C dissolving, filtration, sublimation, evaporation D sublimation, filtration, dissolving, evaporation 5 Which of the following statements about a strong acid and a weak acid is true? A Blue litmus paper turns red in the presence of a strong acid while it remains blue in a weak acid. B A strong acid has a higher concentration of hydrogen ions as compared to