H2 Chemistry Mock A Level Paper 1

1

Copyright © by Liu Ruoyang. All rights reserved. No part of this information may be reproduced or transmitted in any form or by means electronic or mechanical, including photocopying, recording or any information storage or retrieval system without prior permission from the author.

ABC JUNIOR COLLEGE

Mock A level Paper 2012

Higher 2

CANDIDATE

NAME

CLASS INDEX

NUMBER

CHEMISTRY 9647/01

Paper 1 Multiple Choice 1 hr 00 min

READ THESE INSTRUCTIONS FIRST

Write in soft pencil

Do not use staples, paper clips, highlighters, glue or correction fluid. 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. A Data Booklet is provided. 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.

FOR EXAMINER’S USE

TOTAL / 40

This document consists of 15 printed pages.

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 of the following elements can form compounds or molecules with the oxidation states

of +1, 0 and -1?

A Thallium C Caesium

B Fluorine D Hydrogen

2 How many isomers can the compound SHFClBr have (the central atom in this molecule is S,

sulfur)?

A 12 C 4

B 6 D 2

3 When filling electrons to atomic orbitals, which of the following atomic orbitals will be filled

first?

A 4f C 6p

B 5d D 6d

4 A real gas X has a non-zero molecular volume and has only repulsive intermolecular

interactions that scale as 1/r3, where r is the intermolecular distance. Which of the following

series of pressures of 1 mole gas at 290 K of X at volumes 0.2 L, 20 L, 2000 L are consistent

with the characteristic of X?

A 1.32 x 107 Pa, 1.12 x 105 Pa, 1.16 x 103 Pa

B 1.21 x 107 Pa, 1.21 x 105 Pa, 1.21 x 103 Pa

C 0.99 x 107 Pa, 1.10 x 105 Pa, 1.16 x 103 Pa

D 1.34 x 107 Pa, 1.21 x 105 Pa, 1.16 x 103 Pa

5 Burning coal produced sulfur dioxide, an acidic gas that contributes to the formation of acid

rain by reacting with water and thus forming H2SO4 in the atmosphere. A power plant burns

1.00 kg of bituminous coal that contains 5.15 % sulfur by mass (you can assume that all of

the sulfur in the coal is converted to SO2). If 18.0 % of the SO2 produced as a result of this

escaped into the atmosphere and 75.0% of the escaped SO2 were converted to H2SO4, how

much (in g) of H2SO4 would be produced in the atmosphere.

A 21.30 g C 118.00 g

B 0.02 g D 103.00 g

3


6 In which of the following pairs is the second ionisation energy of the first element greater than

that of the second element?

A Caesium, Xenon C Krypton, Rubidium

B Barium, Caesium D Strontium, Rubidium

7 A chloride of a Group V element has the formula MCl3. When 0.100 g of MCl3 was added to

water and the resulting solution titrated with 0.0500 mol dm-3 silver nitrate, it was found that

33.0 cm3 of aqueous silver nitrate was needed to precipitate all the chloride ions. Use these

data to identify element M.

( ) ( ) ( )

A Nitrogen C Arsenic

B Phosphorus D Antimony

8 Which one of the following reactions does NOT produce any gas?

A Adding a piece of silver metal to a dilute aqueous HNO3 solution.

B Heating of concentrated HCl with MnO2.

C Adding a piece of aluminium metal to a concentrated aqueous NaOH solution.

D Electrolysis of dilute aqueous CuBr2 solution.

9 Enthalpy changes for the following reactions can be determined experimentally:

(i) ( ) ( ) ( )

(ii) ( ) ( ) ( ) ( )

(iii) ( )

( ) ( )

Use these values to determine the enthalpy change for the formation of NO (g) from the

elements:

( )

( ) ( )

A 90 kJ mol-1 C -273 kJ mol-1

B 180 kJ mol-1 D -1270 kJ mol-1

4


10 Calculate the lattice energy of CsCl from a Born-Haber cycle using the following standard

enthalpy data:

( )

( ) ( )

( ) ( )

( ) ( )

( ) ( )

( ) ( )

A +218 kJ mol-1 C -668 kJ mol-1

B -218 kJ mol-1 D -789 kJ mol-1

11 In which of the following pairs do the central atoms NOT have the same hybridisation?

A PCl5, IO4- C NH3, H2O

B BF3, H2CO D XeF4, SF6

12 The following reactions, under standard concentrations (1 mol dm-3), are spontaneous and

thus proceed to the right as written:

The strengths of H+, Ag+, Cd2+ and Zn2+ as oxidising agents increase in the following order:

A Ag+ > H+ > Cd2+ > Zn2+

B Zn2+ > Cd2+ > H+ > Ag+

C H+ > Ag+ > Cd2+ > Zn2+

D Cd2+ > Zn2+ > Ag+ > H+

13 The following two half cells were combined to make a battery. Under standard state

conditions (when the concentrations of all reactants and products are equal to 1 mol dm-3)

and when the battery is functioning in discharge mode, what is the standard cell potential for

the spontaneous reactions?

( ) ( )

( )

( )

A -3.08 V C +2.09 V

B +1.60 V D +3.08 V

5


14 When metal A is placed in a solution of metal ions B2+, a reaction occurs between A and B2+,

and metal ions A2+ appear in the solution. When metal B is placed is placed in acid solution,

gas bubbles form on its surface. When metal A is placed in a solution of metal ions C2+, no

reaction occurs. Which of the following reactions would not occur spontaneously?

A ( ) ( ) ( ) ( )

B ( ) ( ) ( ) ( )

C ( ) ( ) ( ) ( )

D ( ) ( ) ( ) ( )

15 A sample of L-dopa, a drug used for the treatment of the symptoms of Parkinson’s disease, is

electrolyzed exhaustively with 42.0 μC. The process requires two electrons per molecule. The

formula weight of L-dopa is 197.2. What is the mass of L-dopa in the sample?

A 42.9 μg C 42.9 ng

B 21.5 ng D 85.8 mg

16 67.3 ml of 0.005 mol dm-3 HCl is needed to reach the equivalence point in the titration of

5.0ml of an aqueous ammonia sample of unknown concentration. Given that NH4+ has a pKa

value of 9.25. What is the pH of the solution at the equivalence point?

A 4.7 C 5.8

B 5.2 D 7.0

17 At room temperature, up to 4.51 g of PbCl2 can be dissolved in 1 L of water. What is the

maximum amount of PbCl2 that one can dissolve in 1 L of 0.1 mol dm-3 NaCl solution?

A 0.12 g C 0.47 g

B 0.44 g D 1.33 g

18 0.1 moles of CO2 is allowed to react with excess solid graphite at 1000 K in a reaction

chamber with a volume of 3 L. The equation for the reaction is:

( ) ( ) ( ) The final equilibrium pressure inside the chamber is 3.66 x 105Pa. Calculate the final

equilibrium pressure if the chamber is changed to a 6 L container instead while the

temperature is maintained at 1000 K. (you may assume ideal gas behaviour)

A 1.39 x 105 Pa C 1.97 x 105 Pa

B 1.83 x 105 Pa D 2.14 x 105 Pa

6


19 Hydrogen sulphide will react with water as shown in the following reactions.

( ) ( ) ( ) ( )

( ) ( ) ( ) ( )

( ) ( ) ( ) ( )

What is the value of K2?

A 1.3 x 10-27 C 1.3 x 10-13

B 2.3 x 10-7 D 7.7 x 1012

20 There is a solution of a certain acid with pH = 4 and with a volume of 10 mL in a container.

Which of the following is the most suitable statement when it is diluted to 100 mL?

A The pH of this solution will be 6.

B The pH of this solution will be 5 if the acid is a weak one.

C The pH of this solution will be 4.5 if the acid is a weak one.

D The pH of this solution cannot be predicted or calculated regardless of the strength

of the acid.

21 Addition of NaCl to AgNO3 solution gives a white precipitate. Further addition of NH3.H2O into

this mixture dissolves the precipitate. Why?

A Addition of NH3.H2O increases the pH of the solution, reversing the precipitation

reaction.

B Addition of NH3.H2O increases the solubility of the precipitate, dissolving it.

C NH3.H2O coordinates to Ag+ ions, forming complex ions that are soluble.

D Addition of NH3.H2O increases the volume of total solution, effectively increasing the

total amount of AgCl dissolved in solution.

22 Ideal gases A, B and C reacts according to the equation

( ) ( ) ( )

The reaction is first order in both A and B. If the pressure of the reaction chamber is doubled,

but the temperature remains the same, by what factor does the rate of reaction change?

A 0.25 C 4

B 1 D 8

7


23 The rate constants for reaction 1 and reaction 2 have the same units. At T = 300 K, the rate

constant for reaction 1 is the same as that of reaction 2. At T = 400 K, the rate constant of

reaction 1 is twice that of reaction 2. What is the difference in activation energies between the

two reactions?

Given Arrhenius equation

Where k is the rate constant, A is a constant, Ea is the activation energy, R is the molar gas

constant, T is the thermodynamic temperature.

A -2305 J mol-1 C -6915 J mol-1

B +2305 J mol-1 D +6915 J mol-1

24 What is the major product of the following reaction?

A

B

C

D

8


The information below is required for questions 25 and 26.

Below is an organic reaction in which a conjugated enone is formed.

The following shows the reaction and its mechanism.

25 Which of the following is false regarding the above reaction?

A An elimination reaction is involved in the mechanism.

B A nucleophilic addition reaction is involved in the mechanism.

C A nucleophilic substitution reaction is involved in the mechanism.

D The overall reaction is classified as condensation.

26 The expected major product from the following reaction would be

9


A

B

C

D

27 A researcher was carrying out several experiments at one time and he made a mistake by

adding water to the one of his reactions even before the reaction had reached completion.

The experiment thus had the following reaction sequence:

In an attempt to see what he can salvage from this error, he sat down and drafted the

possible organic products I to V that could have resulted from the reactions:

10


Which of the above compounds could, in theory, result from the above reaction?

A I and II only

B III and IV only

C IV and V only

D II and III only

28 You are tasked to prepare the following compound from an organic starting material and any

inorganic reagents in three steps or less:

Which of the following starting material is expected to give you the lowest yield of the desired

product?

A

B

C

D

11


29 What is the major product of the following reaction?

A

B

C

D

30 A compound has the molecular formula C5H10, and does not decolourise bromine water

under the usual conditions. How many structures are there that fit this data?

A 3 C 6

B 4 D 9

Section B

12


For each of the questions in this section, one or more of the three numbered statements 1 to 3

may be correct.

Decide whether each of the statements is or is not correct (you may find it helpful to put a tick

against the statements that you consider correct).

The response A to D should be selected on the basis of

No other combination of statements is used as a correct response.

31 Addition of a small amount of which of the following chemical(s) to a mixture of a certain

amount of Zn and ethanoic acid solution will slow down the reaction but will not change the

amount of H2 gas generated?

1 Water

2 ZnO

3 Na2CO3

32 Chlorine (Cl2) gas dissolves in water, reaching an equilibrium:

The oxidising HClO species is used for many bleaching applications. Which of the following

reactions CAN produce Cl2 gas?

1 Injection of Br2 gas into concentrated HCl solution.

2 Addition of concentrated hydrochloric acid to MnO2.

3 Addition of KMnO4 to concentrated hydrochloric acid.

33 The half-cells Ag+/Ag and Cl2/Cl- are linked to create a galvanic cell. Which of the following

statement(s) concerning the cell is/are correct?

1 The reduction half-reaction is given by

2 The standard cell potential is 0.56V.

3 Negative ions move in the salt bridge from the Ag/Ag+ half-cell to the Cl2/Cl- half cell.

13




34 Which of the following has the same value as the standard enthalpy change of formation of

carbon monoxide?

1 ( ) ( )

2 ( ) ( )

3

( )

35 The number of moles of chlorine that react with 1 mol of X is twice the number of moles of

chlorine that react with 1 mol of Y.

Which of these pairs could be X and Y?

X Y

1 Mg( ) Na(s)

2 H2 KBr(aq)

3 Cold NaOH (aq) Hot NaOH (aq)

36 The use of the Data Booklet is relevant to this question.

The colours of various vanadium ions in aqueous solution are given in the table below.

Which of the following reactions (if any) can produce a green solution?

1 Adding excess Sn4+ ions to an acidified solution containing V2+ ions.

2 Bubbling excess SO2 into an acidified solution of VO2+ ions.

3 Adding K2S2O8 to an acidified solution containing VO2+ ions.

14




37 The following are several stereorepresentations of lactic acid. Taking X as a reference

structure, which are NOT mirror images of X?

1

2

3

38 Which of the following chemical tests can distinguish between 1-chlorobutane and 2-

chlorobutane?

1 Warm alkaline aqueous iodine

2 Hot Al2O3, followed by KMnO4 in dilute H2SO4

3 Heating with NaOH, followed by KMnO4, then adding Na2CO3

15




39 Oxytetracycline, whose structure is given below, is a class of antibiotics that is used to treat

many common and rare infections.

One mole of oxytetracycline reacts with

1 2.5 moles of bromine in carbon tetrachloride, in the dark

2 6 moles of ethanoyl chloride

3 5 moles of phosphorus pentachloride

40 In which of the following pairs of isomers have different boiling points?

1

and

2

and

3

and

Documents

H2 Chemistry Mock A Level Paper 1