SAJC_H2_CHEM_P1_QP Prelim

1 [Turn Over ST ANDREW’S JUNIOR COLLEGE JC2 Preliminary Examinations Chemistry Higher 2 9647/01 19th September 2016 Paper 1 Multiple Choice 1 hour Additional Materials: Multiple Choice Answer Sheet, Data Booklet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. There are 40 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 Answer Sheet. Each correct answer will score one mar k. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. This document consists of 27 printed pages including this page.

2 [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. What volume of CO 2 will be liberated when y cm3 of 40:60 mixture of volume of methane and ethene are completely burnt in oxygen? A y cm3 B 2y 5 cm3 C 8y 5 cm3 D 2y cm3 2. Use of the Data Booklet is relevant to this question. Ethanedioate ions, C 2O42–, 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 oxidise completely 1.0 x 10-3 mol of the salt NaHC2O4.H2C2O4? A 20 cm3 B 40 cm3 C 50 cm3 D 125 cm3

3 [Turn Over 3. Which graph correctly describes the behaviour of fixed masses of the ideal gases X and Y, where X has a higher Mr than Y? A B C D PV Constant P Y X T / K PV Constant P X Y P PV Constant T X Y PV P Constant T X Y T / C

4 [Turn Over 4. The table below shows the ionisation energy (in kJ mol -1) of four elements labelled A, B, C and D. Element 1st I.E. 2nd I.E. 3rd I.E. 4th I.E. 5th I.E. 6th I.E. A 1012 1907 2914 4964 6274 21 267 B 787 1577 3232 4356 16 091 19 805 C 1521 2666 3931 5771 7238 8781 D 738 1451 7733 10 543 13 630 18 020 Which element above has no p electrons in the valence shell? A Element A B Element B C Element C D Element D

5 [Turn Over 5. The diagram shows the structure of part of a crystal of ice. Which of the following is incorrect? A All bond angles surrounding each oxygen atom are 109.5. B Two electrons from each oxygen atom are involved in forming hydrogen bonds. C The hydrogen bonds are weaker than the O–H covalent bonds. D The open structure of ice causes ice to have a higher volume and lower density than water. 6. Which of the following has an exothermic enthalpy change? A Ba (g)  Ba+ (g) + e– B MgS (s)  Mg2+ (g) + S2– (g) C ½ N2 (g)  N (g) D F (g) + e–  F– (g)

6 [Turn Over 7. The value of pV RT is plotted against p at the same temperature for three gases – Ne, NH3 and C2H6, where p is t