DHS Prelim_H2_CHEM_P1_QP

1 This question paper consists of 18 printed pages and 0 blank page. © DHS 2016 [Turn over Name: Index Number: Class: DUNMAN HIGH SCHOOL Preliminary Examinations 2016 Year 6 H2 CHEMISTRY 9647/01 Paper 1 Multiple Choice 27 September 2016 1 hour Additional Materials: Optical Mark Sheet Data Booklet INSTRUCTIONS TO CANDIDATES 1 Write your name and class on this question paper. 2 There are forty questions on this paper. 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 separate Optical Mark Sheet. 3 Each correct answer will score one mark. A mark will not be deducted for wrong answer. 4 Any rough working should be done in this booklet. 5 You may use a calculator.

2 © DHS 2016 9647/01 [Turn over Section A For each question, there are four possible answers , A, B, C, and D. Choose the one you consider to be correct. 1 Ferrous sulfate (FeSO 4) tablets are commonly prescribed by doctors as 350 mg tablets and serve as a dietary supplement for pregnant women. However, it was found that these tablets may cause poisoning in young children if accidentally consumed. The lethal dosage for a 12.0 kg child is 590 mg of Fe2+. What is the minimum number of tablets that would constitute a lethal dose to a 12.0 kg child? A 1 B 2 C 4 D 5 2 25.0 cm 3 of a solution of 0.0518 mol dm –3 hydroxylammonium chloride, NH 3OH+Cl– was added to a solution containing an excess of acidified Fe 3+ ions and the mixture boiled. The Fe2+ ions in the resultant solution was titrated with 25.90 cm 3 of 0.02 mol dm–3 potassium manganate (VII) solution. Given the mole ratio MnO 4– ≡ 5Fe 2+, which of the following nitrogen –containing species is formed in the reaction? A NH4+ B N2O C NO2 D NO3– 3 Two elements, Y and Z, have the following properties. Property 1: Y and Z form ionic compounds Na3Y and Na3Z respectively. Property 2: Element Z forms ZCl5 molecule whereas Y is unable to form YCl5. Which pair of electronic configurations of Y and Z is correct? Y Z A [He] 2s2 2p2 [Ne] 3s2 3p3 B [He] 2s2 2p3 [Ne] 3s2 3p3 C [He] 2s2 2p2 [He] 2s2 2p3 D [Ne] 3s2 3p2 [Ne] 3s2 3p3

3 © DHS 2016 9647/01 [Turn over 4 For one mole of an ideal gas, which plot produces a straight line graph passing through the origin? Y–axis X–axis A PV P at constant T (K) B P V at constant T (K) C P/ρ T (C) at constant V