MJC H2 Chem 2012 Prelim P1 QP

1 Name ________________________ Class: ___________ Reg Number: _____ MERIDIAN JUNIOR COLLEGE JC2 Preliminary Examination Higher 2 _________________________________________________________________________ Chemistry 9647/1 Paper 1 Multiple Choice 20 September 2012 1 hour Additional Materials: OMR Sheet Data Booklet ___________________________________________________________________ INSTRUCTIONS TO CANDIDATES Write your name, class and register number in the spaces provided at the top of this page. Write your calculator brand and model/number in the box provided above. There are forty questions in this section. Answer all questions. For each question, there are four possible answers labelled A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the OMR answer sheet. Read very carefully the instructions on the use of the OMR answer sheet. You are advised to fill in the OMR Answer Sheet as you go along; no additional time will be given for the transfer of answers once the examination has ended This document consists of 19 printed pages and 1 blank page. Calculator Model / No. Use of OMR Answer Sheet Ensure you have written your name, class register number and class on the OMR Answer Sheet. Use a 2B pencil to shade your answers on the OMR sheet; erase any mistakes cleanly. Multiple shaded answers to a question will not be accepted. For shading of class register number on the OMR sheet, please follow the given examples: If your register number is 1, then shade 01 in the index number column. If your register number is 21, then shade 21 in the index number column.

2 pV p p pV Section A For each question there are for possible answers, A , B, C and D. Choose the one you consider to be correct. 1 Which of the following statements contains one mole of the stated particle? A Molecules in 19.0 g of fluorine gas. B Electrons in 24.0 dm3 of hydrogen gas at room temperature and pressure. C Neutrons in 1.00 g of helium gas. D Protons in 2.02 g of neon gas. 2 Which of the following diagrams correctly describes the behaviour of a fixed mass of an ideal gas at constant T? A C B D p pV T p pV T

3 3 Two elements X and Y have the following properties. · X and Y form ionic compounds Na2X and Na2Y respectively. · Element Y forms YF6 molecule whereas X is unable to do so. Which pair of electronic configurations of X and Y is correct? X Y A [He]2s22p2 [Ne]3s23p2 B [He]2s22p2 [Ne]3s23p4 C [He]2s22p4 [Ne]3s23p2 D [He]2s22p4 [Ne]3s23p4 4 Ions of the two most common isotopes of zinc are shown below: 64 30 2+Zn 66 30 2+Zn Which of the following statements is correct? A Both these Zn 2+ ions have the same number of electrons but different number of protons. B B oth these Zn 2+ ions have the same electron configuration 1s22s22p63s23p63d84s2. C The 64 30 2Zn + ion has fewer neutrons in its nu