DHS Prelim P1_Qn

1 This question paper consists of 17 printed pages and 1 blank page. © DHS 2017 [Turn over Name: Index Number: Class: DUNMAN HIGH SCHOOL Preliminary Examination 2017 Year 6 H2 CHEMISTRY 9729/01 Paper 1 Multiple Choice 25 September 2017 1 hour Additional Materials: Data Booklet Optical Mark Sheet INSTRUCTIONS TO CANDIDATES 1 Write your name, index number and class on this question paper and the OTAS Mark Sheet. 2 There are thirty 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 The use of an approved scientific calculator is expected, where appropriate. 6 On the OTAS Mark Sheet, please shade the code as “Class/Index number”.

2 © DHS 2017 9729/01 [Turn over 1 Use of the Data Booklet is relevant to this question. Which sample of gas contains twice the number of atoms as 4 g of helium gas, He? A 22 g of carbon dioxide, CO2 B 8 g of methane, CH4 C 4 g of hydrogen, H2 D 12 g of steam, H2O 2 When 10 cm3 of a gaseous hydrocarbon was sparked with excess oxygen gas and cooled to room temperature, the gaseous mixture contracted by 30 cm 3. When the residual gas was passed through aqueous potassium hydroxide, there was a further contraction of 40 cm3. What is the hydrocarbon? A 2–methylpropene B propane C butadiene D butane 3 Ethanedioate ions, C 2O42–, are oxidised by acidif ied aqueous potassium manganate (VII) to give carbon dioxide. What volume of 0.020 mol dm –3 potassium manganate(VII) is required to completely oxidise 2.0 x 10–3 mol of the salt NaHC2O4.H2C2O4? The half equation for MnO4– is given below: MnO4– + 8H+ + 5e–  Mn2+ + 4H2O A 20 cm3 B 40 cm3 C 80 cm3 D 100 cm3

3 © DHS 2017 9729/01 [Turn over 4 The successive ionisation energies, in kJ mol–1, of elements G and H are given below. G 580 1820 2740 11600 14800 18400 23300 H 940 2050 2970 4140 6590 7880 14900 Which statements about elements G and H are true? 1 The first ionisation energy of G is lower than that of the element preceding it in the Periodic Table. 2 G and H forms a compound with the formula G3H2. 3 H has an outer electronic configuration ns2 np4. 4 When oxides of G and H are added separately to water containing Universal Indicator solution, the solution turns blue and red respectively. A 1 and 3 only B 3 and 4 only C 2, 3 and 4 only D 1, 2