NYGH 2010-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 Tuesday 4 May 2010 0745-0845 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 6 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. Examiner’s Use Section A (15 marks) Section B (20 marks) Section C (10 marks) Total (45 marks) Setter: ET This document consists of 11 printed pages. NANYANG GIRLS' HIGH SCHOOL [ Turn over]

2010 Secondary Three Block Test 1 Nanyang Girls’ High School Setter: ET Chemistry 2 Section A (15 marks) Choose the most suitable answer and write its letter in the answer table provided on Page 6. 1 Copper(II) sulfate crystals can be s eparated from sand using the four processes listed below. The order in which these processes should be used is 1st 2 nd 3 rd 4 th A filtration solution crystallization evaporation B solution evaporation filtration crystallization C filtration solution evaporation crystallization D solution filtration evaporation crystallization 2 A drug was tested for purity through ch romatography using propanol as the solvent. If the drug has an R f value of 0.60, at whic h point should the spot be found? 3 The elements T, X and Y have consecutive, increasing atomic numbers. If element T is noble gas, what will be the symbol for the ion of element Y in its compounds? A Y3+ C Y+ B Y2- D Y2+ 4 The number of valence electr ons of atoms of elements W, X, Y, Z are 7, 1, 6, and 2 respectively. Which of the follo wing represents the correct chemical formulae when these elements react? A W2Z, Y2X B Z2W, X2Y C ZW2, X2Y D WZ2, YX2

2010 Secondary Three Block Test 1 Nanyang Girls’ High School Setter: ET Chemistry [Turn Over] 3 5 In which one of the following sets do all 3 particles have the same total number of electrons? A CI ─, Br─,I─ B F─, Ne, Na+ C H─, H, H+ D S2-, SO3, SO3 2- 6 A stable molecule containi ng atoms of the elements X, Y and Z has the following structure. What are the elements X, Y and Z? X Y Z A Sulfur Aluminium Hydrogen B Nitrogen Carbon Hydrogen C Carbon Nitrogen Ch