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5070 s13 er.pdf


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Cambridge General Certificate of Education Ordinary Level
5070 Chemistry June 2013
Principal Examiner Report for Teachers

CHEMISTRY
Paper 5070/11
Multiple Choice

Question
Number

Key

Question
Number

Key

1
2
3
4
5

A
D
A
A
B

21
22
23
24
25

D
B
B
C
B

6
7
8
9
10

C
D
C
A
B

26
27
28
29
30

B
D
D
D
B

11
12
13
14
15

C
B
C
D
C

31
32
33
34
35

B
A
B
D
C

16
17
18
19
20

D
B
C
C
A

36
37
38
39
40

A
A
A
B
B

General Comments
Candidates found questions 1 and 39 the most straightforward and the remainder of the paper was a good
test of the candidates’ knowledge and ability.
Comments on Specific Questions
Question 8
Magnesium oxide and aluminium oxide are both ionic compounds and therefore conduct electricity when
molten. The temperature range over which both compounds are molten is 2852 to 2880ºC.
Question 15
Zinc is above copper in the reactivity series and therefore zinc is the metal which ionises in the cell shown in
the question.

1

© 2013