AQA A-LEVELCHEMISTRY PAPER 2 ORGANIC AND PHYSICAL
CHEMISTRY
Please write clearly in block capitals.
Centre Candidate
number number
Surname
Forename(s)
Candidate ure
A-level
CHEMISTRY
Paper 2 Organic and Physical Chemistry
Tuesday 12 June 2018 Afternoon Time allowed: 2 hours
Materials For Examiner’s Use
For this paper you must have:
the Periodic Table/Data Booklet, provided as an insert (enclosed) Questio Mark
n
a ruler with millimetre measurements
1
a scientific calculator, which you are expected to use where appropriate.
2
Instructions 3
Use black ink or black ball-point pen. 4
Fill in the boxes at the top of this page.
5
Answer all questions.
You must answer the questions in the spaces provided. Do not 6
write outside the box around each page or on the blank pages. 7
Do all rough work in this book. Cross through any work you do not want to be
8
marked.
9
Information 10
The marks for questions are shown in brackets. 11
The maximum mark for this paper is 105.
TOTAL
,*jun1 7405201*
IB/M/Jun18/E10 7405/2
, Do not
write
2 outside the
box
Answer all questions in the spaces provided.
0 1 This question is about the reactions of alkanes.
0 1 .1 Alkanes can be used as fuels.
Give an equation for the combustion of heptane (C7H16) in an excess of oxygen.
[1 mark]
0 1
.2 Heptane can be obtained from the catalytic cracking of hexadecane
(C16H34) at a high temperature.
Identify a suitable catalyst for this process.
Give one condition other than high temperature.
Give an equation for the catalytic cracking of one molecule of hexadecane
to produce one molecule of heptane, one molecule of cyclohexane and
one other product.
[3 marks]
Catalyst
Condition
Equation
0 1 .3 Alkanes can be used in free-radical substitution reactions to
produce halogenoalkanes.
Give equations for the propagation steps in the reaction of
butane to form 2-chlorobutane.
[2 marks]
*02
* IB/M/
Jun18/7405/2
, Do not
3 write
outside the
box
0 1 .4 Chlorofluorocarbons (CFCs) are a group of halogenoalkanes currently
banned in
many countries. They cannot be used as solvents or refrigerants because
of their effect on the environment.
The structure of a CFC is shown.
Identify the radical produced from this CFC that is responsible for the
depletion of ozone in the atmosphere.
Explain, with the aid of equations, why a single radical can cause the
decomposition of many molecules of ozone.
[4 marks]
Radical
Explanation
10
Turn over for the next question
Turn over ►
*03
IB/M/
* Jun18/7405/2
CHEMISTRY
Please write clearly in block capitals.
Centre Candidate
number number
Surname
Forename(s)
Candidate ure
A-level
CHEMISTRY
Paper 2 Organic and Physical Chemistry
Tuesday 12 June 2018 Afternoon Time allowed: 2 hours
Materials For Examiner’s Use
For this paper you must have:
the Periodic Table/Data Booklet, provided as an insert (enclosed) Questio Mark
n
a ruler with millimetre measurements
1
a scientific calculator, which you are expected to use where appropriate.
2
Instructions 3
Use black ink or black ball-point pen. 4
Fill in the boxes at the top of this page.
5
Answer all questions.
You must answer the questions in the spaces provided. Do not 6
write outside the box around each page or on the blank pages. 7
Do all rough work in this book. Cross through any work you do not want to be
8
marked.
9
Information 10
The marks for questions are shown in brackets. 11
The maximum mark for this paper is 105.
TOTAL
,*jun1 7405201*
IB/M/Jun18/E10 7405/2
, Do not
write
2 outside the
box
Answer all questions in the spaces provided.
0 1 This question is about the reactions of alkanes.
0 1 .1 Alkanes can be used as fuels.
Give an equation for the combustion of heptane (C7H16) in an excess of oxygen.
[1 mark]
0 1
.2 Heptane can be obtained from the catalytic cracking of hexadecane
(C16H34) at a high temperature.
Identify a suitable catalyst for this process.
Give one condition other than high temperature.
Give an equation for the catalytic cracking of one molecule of hexadecane
to produce one molecule of heptane, one molecule of cyclohexane and
one other product.
[3 marks]
Catalyst
Condition
Equation
0 1 .3 Alkanes can be used in free-radical substitution reactions to
produce halogenoalkanes.
Give equations for the propagation steps in the reaction of
butane to form 2-chlorobutane.
[2 marks]
*02
* IB/M/
Jun18/7405/2
, Do not
3 write
outside the
box
0 1 .4 Chlorofluorocarbons (CFCs) are a group of halogenoalkanes currently
banned in
many countries. They cannot be used as solvents or refrigerants because
of their effect on the environment.
The structure of a CFC is shown.
Identify the radical produced from this CFC that is responsible for the
depletion of ozone in the atmosphere.
Explain, with the aid of equations, why a single radical can cause the
decomposition of many molecules of ozone.
[4 marks]
Radical
Explanation
10
Turn over for the next question
Turn over ►
*03
IB/M/
* Jun18/7405/2
