ACSI 2019 Y3 IP Chemistry FYE

This paper consists of 12 printed pages. Anglo-Chinese School (Independent) Year 3 Integrated Programme Final Examination 2019 CHEMISTRY PAPER 1 Monday 30th September 2019 TIME 1 hour Additional material: OTAS answer sheet INSTRUCTIONS TO CANDIDATES Do not open this booklet until you are told to do so. Shade your Candidate Number on the OTAS answer sheet in the spaces provided. 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 OTAS answer sheet. INFORMATION FOR CANDIDATES There are forty questions in this paper, carrying a total of 40 marks. A copy of the Periodic Table is printed on page 2. Electronic calculators may be used.

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Page 3 of 32 1 Which of the following will increase the rate of diffusion? A. decrease in polarity of molecules B. decrease in relative molecular mass C. decrease in concentration gradient D. decrease in temperature 2 Which of the following statements is not true about freezing? A. A pure substance freezes at a constant temperature. B. Particles lose energy to the surrounding during freezing. C. Particles stop moving. D. Freezing is a physical process. 3 Which statement is true? A. N3– has the same number of electrons as P3–. B. S2– has the same number of electrons as K+. C. Ca2+ has more electrons than Ca. D. Na+ has more electrons than Mg2+. 4 Which particles are isoelectronic with one another ? [Q, R, S and T are not the actual chemical symbols.] A. Q8 14 2– and R10 19 B. R10 19 and T15 31 C. S11 23 2+ and R10 19 D. Q8 14 2– and S11 23 2+ 5 Which atom has a half-filled p sub-shell? A. Ne B. P C. F D. O

Page 4 of 32 7 Which formula represents the empirical formula of a compound? A. C2H4O B. C2H4O2 C. C6H12 D. H2O2 8 Which of the following hydroxides contains the smallest percentage of metal in one mole of the compound? A. Fe(OH)2 B. Ni(OH)2 C. Pb(OH)2 D. Mg(OH)2 9 The number of ions produced when 3.45 g of LiNO3 dissolves completely in water is A. 0.3 x 1023 B. 0.6 x 1023 C. 0.9 x 1023 D. 1.2 x 1023 10 4.00 g of solid sodium hydroxide is added to water to make a solution with a concentration of 0.200 mol dm-3. What is the volume of water used? A. 0.5 cm3 B. 20 cm3 C. 500 cm3 D. 2000 cm3 6 The electronic structures of atoms Q and R are shown. Q and R combine chemically to form an ionic compound. What is the formula of the compound? A. R7Q B. R4Q2 C. RQ D. RQ7

Page 5 of 32 11 Which compound contains both ionic and covalent bonds? A. MgC 2 B. HC C. CH3COOH D. NH4C 12 Three statements on metallic bonding are shown. I. They are electrostatic in nature. II. The metal ions are delocalised. III. Its strength is directly proportional to the magnitude of the charge of the ions. Which statement(s) is/are correc