NYGH 2011-S3EOY-Chem P2

Class Register Number Name 南洋女子中学校 NANYANG GIRLS’ HIGH SCHOOL End-of-Year Examination 2011 Secondary Three CHEMISTRY 1 hour 45 minutes Paper 2 Structured Questions 09 15 to 11 00h Thursday 13 October 2011 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 writing 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 writing paper provided. At the end of the examination, 1. hand in Section A and Section B separately. 2. fasten all your written papers for Section B securely with the strings provided. 3. tick 11 Either (for Either) or 11 Or (for Or) in the grid below to indicate which question you have answered. INFORMATION FOR CANDIDATES 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. Use of Scientific Calculator is allowed. A copy of the Periodic Table is found on page 15. Examiner’s Use Section A Section B 9 10 11 Either 11 Or Total Setters: GB/AS/ET This document consists of 15 printed pages. NANYANG GIRLS’ HIGH SCHOOL [Turn over

2011 End-of-Year Examination Secondary Three 2 Nanyang Girls’ High School Setters: GB/AS/ET Chemistry /II Section A Answer all questions. Write your answers in the spaces provided. A1 Answer the questions below by using the reagents listed below. Cu(s) AgNO 3(aq) H 2SO4(aq) Na2CO3(aq) NaOH(aq) Cu(NO 3)2(aq) (NH4)2SO4(aq) BaC l2(aq) Zn(s) Each reagent may be used once, more than once, or not at all. Give two reagents which when mixed together (a) would produce a soluble salt and a gas by using the titration method. .................................................................................................................................. [1] (b) would produce a blue precipitate. ................................................................................................................................... [1] (c) would produce an alkaline gas upon warming. ................................................................................................................................... [1] [Total marks: 3]

2011 End- of-Year Examination Secondary Three 3 Nanyang Girls’ High School Setters: GB/AS/ET Chemistry /II [Turn over A2 (a) The following questions refer to the diagram below. Answer the following questions using the gases listed below. hydrogen (H 2) oxygen (O2)