JC2 Chemistry H1 2017 Dunman QP

© DHS 2017 8872/01 [Turn over Name: Index Number: Class: DUNMAN HIGH SCHOOL Preliminary Examination 2017 Year 6 H1 CHEMISTRY 8872/01 Paper 1 Multiple Choice 25 September 2017 50 minutes 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 8872/01 [Turn over 1 Use of the Data Booklet is relevant to this question. Which of these samples of gas contains twice the number of atoms as 4 g of helium gas, He? A 22 g of carbon dioxide, CO 2 B 8 g of methane, CH 4 C 4 g of hydrogen, H 2 D 12 g of steam, H 2 O 2 Bones contain a complex mixture of calcium salts, protein and other material. When a sample of 50.0 g bone is strongly heated in air, the only residue formed is calcium oxide and its mass is determined to be 14.0 g. What is the percentage by mass of calcium in the bone? A 10% B 14% C 20% D 23% 3 Ethanedioate ions, C 2 O 4 2– , are oxidised by acidified 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 NaHC 2 O 4 . H 2 C 2 O 4 ? The half equation for MnO 4 – is given below: MnO 4 – + 8H + + 5e –  Mn 2+ + 4H 2 O A 20 cm 3 B 40 cm 3 C 80 cm 3 D 100 cm 3 4 Which of the following corresponds to the electronic configuration of 3 electrons of highest energy for a Group 13 element at its ground state? A 3s 2 3p 3 B 1s 1 2s 1 2p 1 C 4s 2 4p 1 D 3s 1 3p 2

3 © DHS 2017 8872/01 [Turn over 5 The hydrogen molecule contains a covalent bond. What holds the atoms together in this covalent molecule? A The electrostatic attraction between the electrons in the bond pair and the two nuclei. B The electrostatic attraction between the electron of one hydrogen atom and the nucleus of the other hydrogen atom. C The electrostatic attraction between the atoms in the molecule. D The energy released in the formation of the covalen