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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

9701/13
May/June 2010 1 hour

*2288633369*

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 13 printed pages and 3 blank pages. IB10 06_9701_13/RP © UCLES 2010

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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 Which gas closely approaches ideal behaviour at room temperature and pressure? A B C D 2 ammonia carbon dioxide helium oxygen

Use of the Data Booklet is relevant to this question. The elements radon (Rn), francium (Fr) and radium (Ra) have consecutive proton numbers in the Periodic Table. What is the order of their first ionisation energies? least endothermic A B C D Fr Fr Ra Rn Ra Rn Fr Ra most endothermic Rn Ra Rn Fr

3

Use of the Data Booklet is relevant to this question. What could be the proton number of an element that has three unpaired electrons in each of its atoms? A 5 B 13 C 15 D 21

4

Given the following enthalpy changes, I2(g) + 3Cl2(g) → 2ICl3(s) I2(s) → I2(g) ∆Ho = –214 kJ mol–1 ∆Ho = +38 kJ mol–1

What is the standard enthalpy change of formation of iodine trichloride, ICl3(s)? A B C D +176 kJ mol–1 –88 kJ mol–1 –176 kJ mol–1 –214 kJ mol–1 9701/13/M/J/10

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3 5 Some bond energy values are listed below. bond C–H C–Cl Cl–Cl Br–Br bond energy / kJ mol–1 410 340 244 193

These bond energy values relate to the following four reactions. P Q R S Br2 → 2Br 2Cl → Cl2 CH3 + Cl → CH3Cl CH4 → CH3 + H

What is the order of enthalpy changes of these reactions from most negative to most positive? A B C D 6 P→Q→R→S Q→R→S→P R→Q→P→S S→P→Q→R

Which mass of gas would occupy a volume of 3 dm3 at 25 °C and 1 atmosphere pressure? [1 mol of gas occupies 24 dm3 at 25 °C and 1 atmosphere pressure.] A B C D 3.2 g O2 gas 5.6 g N2 gas 8.0 g SO2 gas 11.0 g CO2 gas

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Ammonium nitrate, NH4NO3, can decompose explosively when heated. NH4NO3 → N2O + 2H2O What are the changes in the oxidation numbers of the two nitrogen atoms in NH4NO3 when this reaction proceeds? A –2, –4 B +2, +6 C +4, –6 D +4, –4

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4 8 The Haber process for the manufacture of ammonia is represented by the following equation. N2(g) + 3H2(g) 2NH3(g) ∆H = –92 kJ mol–1

Which statement is correct about this reaction when the temperature is increased? A B C D 9 Both forward and backward rates increase. The backward rate only increases. The forward rate only increases. There is no effect on the backward or forward rate.

Use of the Data Booklet is relevant to this question. 2.920 g of a Group II metal, X, reacts with an excess of chlorine to form 5.287 g of a compound with formula XCl2. What is metal X? A B C D barium calcium magnesium strontium

10 The table gives the concentrations and pH values of the aqueous solutions of two compounds, X and Y. Either compound could be an acid or a base. X concentration pH Student P concluded that X is a strong acid. Student Q...
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