NYGH 2015-S3MYE-Chem

Class Register Number Name 南洋女子中学校 NANYANG GIRLS’ HIGH SCHOOL Mid-Year Examination 2015 Secondary Three CHEMISTRY 1 hour 30 minutes Theory Paper 0800h-0930h Wednesday 13 May 2015 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. Section A (MCQ) Write your name, class and register number on the Multiple Choice Answer Sheet provided. There are twenty 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 answer sheet. Section B (Structured) Answer All questions in the spaces provided on the Question Paper. Section C (Free-Response) Answer All questions. Write your answers on the separate writing paper provided. Submit Multiple Choice Answer Sheet, Question Paper and Writing Paper separately. The intended number of marks is given in the brackets [ ] at the end of each question or part question. A copy of the Periodic Table is printed on page 13. Examiner’s Use Section A (20 marks) Section B (30 marks) Section C (10 marks) Total (60 marks) Setters: CHG, LSC This document consists of 13 printed pages. NANYANG GIRLS’ HIGH SCHOOL [Turn over]

2015 Mid-Year Examination Secondary Three 2 Nanyang Girls’ High School Setters: CHG, LSC Chemistry Section A (20 marks) 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 answer sheet. 1 Which of the following salts is prepared using titration? A aluminium chloride B ammonium nitrate C lead(II) sulfate D iron(II) chloride 2 Which of the following is NOT true? A Hydrogen chloride gas turns moist blue litmus paper red. B Sulfur dioxide gas turns dry blue litmus paper red. C An acid only shows its acidic properties in the presence of water. D Acid molecules ionize in the presence of water to produce hydrogen ions. 3 Which one of the following compounds will not increase the pH of an acidic solution? A calcium oxide C calcium hydroxide B calcium carbonate D calcium sulfate 4 Which of the following is the correct ionic equation for the formation of an insoluble salt? A Ag+(aq) +Cl - (aq)  AgCl(s) B Na+(aq) + NO3 -(aq)  NaNO3(s) C 2K+(aq) + SO4 2-(aq)  K2SO4(s) D Pb2+(aq) + 2NO3 -(aq)  Pb(NO3)2(s) 5 Which of the following gives ONLY a colourless solution when reacted with dilute hydrochloric acid? A barium carbonate C potassium hydroxide B copper(II) oxide D zinc metal 6 Ant bites are acidic in nature. Which of the following is suitable for treating it? A vinegar C sugar B baking powder D