NYGH 2013-S3BT1-Chem

Class Register Number Name 南洋女子中学校 NANYANG GIRLS' HIGH SCHOOL BLOCK TEST 1 Secondary Three CHEMISTRY 1 hour Monday 08 April 2013 1115-1215 h 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 (Multiple Choice) Section A (15 MCQ) This section consists of 15 multiple choice questions. Choose the best answer and write its letter in the space provided on page 2 of the Question Paper. Section B (Structured) Answer all questions in the spaces provided on the Question Paper. Section C (Free-Response) Answer all questions in the spaces provided on the Question Paper. Submit Sections A, B and C together. INFORMATION FOR CANDIDATES 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 11. Topics to be tested: Acids and Bases Salt preparation Ionic equations Qualitative analysis Examiner’s Use Section A (15 marks) Section B (20 marks) Section C (10 marks) Total (45 marks) Setter: CHG This document consists of 11 printed pages. NANYANG GIRLS' HIGH SCHOOL [ Turn over]

2013 Block Test 1 Nanyang Girls’ High School Secondary Three Setter: CHG. Chemistry 2 Section A (15 Marks) Answer the questions (1-15) by filling the answer in the table below. 1 6 11 2 7 12 3 8 13 4 9 14 5 10 15 Section B (20 marks) Answer all questions in this section in the spaces provided B1 State the formulae of compounds E to G. (a) Aqueous sodium hydroxide was added dropwise to an aqueous solution of E. A white precipitate which was insoluble in excess aqueous sodium hydroxide was observed. When a mixture of aqueous silver nitrate and dilute nitric acid was added to another sample of an aqueous solution of E, a white precipitate was formed. [2] E: (b) When aqueous sodium hydroxide was added to an aqueous solution of F, a pungent gas was evolved upon warming the mixture which turned moist red litmus blue. When dilute hydrochloric acid was added to another sample of an aqueous solution of F, a colourless and odourless gas, which formed a white precipitate in limewater, was evolved. [2] F: (c) Aqueous ammonia was added dropwise to an aqueous solution of G. A blue precipitate which was soluble in excess aqueous ammonia was observed. When a mixture of aqueous lead(II) nitrate and dilute nitric acid was added to another sample of an aqueous solution of G, a yellow precipitate was formed. [2] G:

2013 Block Test 1 Nanyang Girls’ High School Secondary Three 3 (c) Aqueous ammonia was added dropwise to an aqueous solution of H. A white precipitate which was soluble in excess