NYGH 2011-S3BT2-Chem

Class Register Number Name 南洋女子中学校 NANYANG GIRLS' HIGH SCHOOL BLOCK TEST 2 Secondary Three CHEMISTRY 1 hour Thursday 4 August 2011 1015-1115 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 10. TEST TOPICS: ƒ Qualitative Analysis ƒ Acids and Bases ƒ Salt Preparation ƒ Ionic Equations ƒ Mole Concept Examiner’s Use Section A (15 marks) Section B (20 marks) Section C (10 marks) Total (45 marks) Setter: A Siew This document consists of 10 printed pages. NANYANG GIRLS' HIGH SCHOOL [ Turn over]

2011 Secondary Three Block Test 2 Nanyang Girls’ High School Setter: A Siew Chemistry 2 ection A (15 Marks)S (1-15) by filling the answer in the table below.Answer the questions 1 6 11 2 7 12 3 8 13 4 9 14 5 10 15 ection B (20 marks)S n this section in the spaces providedAnswer all questions i 1 In an experiment, a sample of iron powder was oxidized to form a certain the empirical formula of the oxide if it contained 30% by [3] ) .5 mole of the oxide of iron produced in B1(a) completely reacted ) Calculate the number of moles of hydrochloric acid reacted. ] i) rite down a balanced chemical equation for this reaction, ] B oxide of iron. (a) Calculate mass of oxygen. (b 0 with 109.5 g of dilute hydrochloric acid to form a salt of iron and water. (i [2 (i W complete with the state symbols. [2 (ii) escribe the observations that will be obtained when excess ] D aqueous sodium hydroxide was added gradually to the salt of iron obtained from the reaction. [2

2011 Secondary Three Block Test 2 Nanyang Girls’ High School Setter: A Siew Chemistry [Turn Over] 3 2 ) hen nitrogen gas was reacted wit h hydrogen gas at a certain temperature and pressure, ammonia gas was produced. If there were 120 3 i) calculate the mass of nitrogen present in the ammonia gas produced. ] ii) calculate the number of ammonia molecules produced. ] ) he empirical formula of a certain gas is XY2. he relative atomic mass of X and Y are 12 and 1 respectively. e ] i) A