Exam Paper

Topics: Ammonia, Chlorine, Ideal gas law Pages: 12 (3002 words) Published: March 17, 2013
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level

CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) Data Booklet

May/June 2012 1 hour


READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, Centre number and candidate number on the Answer Sheet in the spaces provided unless this has been done for you. 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 Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet.

This document consists of 14 printed pages and 2 blank pages. IB12 06_9701_11/3RP © UCLES 2012

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2 Section A For each question there are four possible answers, A, B, C, and D. Choose the one you consider to be correct. 1 In which species does the underlined atom have an incomplete outer shell? A 2 BF3 B CH3– C F2O D H3O+

Ammonia is manufactured by the Haber Process, in an exothermic reaction. Assuming that the amount of catalyst remains constant, which change will not bring about an increase in the rate of the forward reaction? A B C D decreasing the size of the catalyst pieces increasing the pressure increasing the temperature removing the ammonia as it is formed


The equation for a reaction is shown. H2(g) +
1 2

O2(g) → H2O(l) ; ∆H = x kJ mol–1

Which pair of descriptions is fully correct for this reaction? type(s) of enthalpy change A B C D 4 formation only formation only combustion, formation combustion, formation value of x positive negative positive negative

The value of the second ionisation energy of calcium is 1150 kJ mol–1. Which equation correctly represents this statement? A B C D Ca(g) → Ca2+(g) + 2e− ; Ca+(g) → Ca2+(g) + e− ; Ca+(g) → Ca2+(g) + e− ; Ca(g) → Ca2+(g) + 2e− ; ∆H o = +1150 kJ mol–1 ∆H o = +1150 kJ mol–1 ∆H o = –1150 kJ mol–1 ∆H o = –1150 kJ mol–1

© UCLES 2012


3 5 Two conversions are outlined below. NH4+ → NH3 C2H4 → C2H6 What similar feature do these two conversions have? A B C D 6 a lone pair of electrons in the product change in oxidation state of an element decrease in bond angle of the species involved disappearance of a π bond

Use of the Data Booklet is relevant to this question. The gas laws can be summarised in the ideal gas equation. pV = nRT 0.56 g of ethene gas is contained in a vessel at a pressure of 102 kPa and a temperature of 30 °C. What is the volume of the vessel? A 49 cm3 B 494 cm3 C 48 900 cm3 D 494 000 cm3


Propanone has the molecular formula C3H6O. The enthalpy change of combustion of hydrogen is –286 kJ mol–1. The enthalpy change of combustion of carbon is –394 kJ mol–1. The enthalpy change of combustion of propanone is –1786 kJ mol–1. Using this information, what is the enthalpy change of formation of propanone? A B C D –1106 kJ mol–1 –540 kJ mol–1 –254 kJ mol–1 +1106 kJ mol–1


Under which set of conditions is a gas most likely to behave ideally? temperature A B C D high high low low pressure high low high low

© UCLES 2012


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4 9 Two moles of compound P were placed in a vessel. The compound P was partly decomposed by heating. A dynamic equilibrium between chemicals P, Q and R was established. At equilibrium, x mol of R were present and the total number of moles present was (2 + x). What is the equation for this equilibrium? A B C D P 2P 2P 2P 2Q + R 2Q + R Q+R Q + 2R

10 The oxide of titanium, TiO2, is used as a ‘whitener’ in toothpaste. It is obtained...
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