NYGH 2011-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 Wednesday 6 April 2011 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: SChew This document consists of 11 printed pages. NANYANG GIRLS' HIGH SCHOOL [ Turn over]

2011 Block Test 1 Nanyang Girls’ High School Secondary Three Setter: SChew 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 The table shows the atomic structure of six particles, represented by the letters B L to Q. The particles are either atoms or ions. The letters are not the symbols of the elements. Particle Electrons Protons Neutrons L 6 6 6 M 2 2 2 N 12 12 12 O 10 12 12 P 6 6 8 Q 10 13 14 sing the letters L to Q, answer the following questions: U ) Which two particles are ions? [2](a (b) hich particle is an atom of a noble gas? ]W [1 (c) hich two particles are an atom and an ion of the ] W same element? [2 (d) hich two particles have the same electronic ] W structure as neon (2.8)? [2 (e) isotopes of the same [2] (f) rite out the formula of the compound formed [1] Which two particles are element? W when an atom of particle L reacts with oxygen.

2011 Block Test 1 Nanyang Girls’ High School Secondary Three Setter: SChew Chemistry [Turn Over] 3 B2 (a) alence electrons) to show the bonding in (i) de [2] i) oxygen gas [2] ) Explain why magnesium oxide has a higher melting point than oxygen gas? [2] Draw a ‘dot-and-cross’ diagram (showing only v magnesium oxi (i (b

2011 Block Test 1 Nanyang Girls’ High School Secondary Three Setter: SChew Chemistry 4 3 The following diagram was obtained from