NYGH 2013-S3EOY-Chem P1

Class Register Number Name 南洋女子中学校 NANYANG GIRLS’ HIGH SCHOOL End-of-Year Examination 2013 Secondary Three Chemistry Paper 1 Multiple Choice 45 minutes Wednesday 9th October 2013 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 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. Setter: ET This document consists of 12 printed pages. NANYANG GIRLS’ HIGH SCHOOL

2013 End-of-Year Examination Secondary Three 2 Nanyang Girls’ High School Setter: ET Chemistry / I 1 The approximate pH values of aqueous solutions of four s ubstances commonly used in cooking are shown. Which substance could be taken to neutralize excess acid in the stomach? Substance pH A baking soda 9 B salt 7 C lemon juice 4 D vinegar 3 2 In which reaction is hydrochloric acid not behaving as an acid? A HCl(aq) + AgNO3(aq) → AgCl(s) + HNO3(aq) B 2HCl(aq) + CaCO3(aq) → CaCl2(aq) + CO2 (g) + H2O(l) C 2HCl(aq) + Fe(s) → FeCl2(aq) + H2 (g) D 6HCl(aq) + Fe2O3(s) → FeCl3(aq) + 3H2O(l) 3 Which of the following are true about calcium hydroxide solution? 1 It conducts electricity. 2 It liberates ammonia gas when heated with an ammonium salt. 3 It turns Universal Indicator red. 4 It liberates carbon dioxide fr om sodium carbonate solution. A 1 and 2 only B 1 and 3 only C 3 and 4 only D 1, 2 and 3 only

2013 End-of-Year Examination Secondary Three 3 Nanyang Girls’ High School Setter: ET Chemistry / I [Turn over 4 A titration experiment bet ween two aqueous solutions, X and Y was carried out. The pH value of the solution was monitored using the data logging. A graph of pH of the solution against the volume of X was plotted as shown. What are the possible identities of X and Y? X Y A Na 2CO3 KOH B HCl KOH C H2SO4 CaCO 3 D NH3 HNO 3 5 Salt PQ is to be prepared by reacting the carbonate of P with the acid HQ. The titration method is to be used to carry out the preparation. What are the solubilities of the carbonate, the acid and the salt? The carbonate of P The acid HQ The salt PQ A insoluble soluble insoluble B insoluble soluble soluble C soluble insoluble insoluble D soluble soluble soluble 6 Which of the following