Chemical Changes and Structure
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
1
Speed of
reaction
A
B
C
D
Unchanged
Faster
Unchanged
Faster
Mass of the
catalyst left at
the end in
grams
0
0
1
1
answer
D
2
Increase / Faster reaction
answer
3
D
answer
4
A
Increase in
particle size
B
Decrease in
particle size
C
Increase in
concentration
D
Decrease in
concentration
E
Increase in
temperature
F
Decrease in
temperature
Identify the factor that is responsible for the
change in reaction rate when:
A carton of milk goes sour more slowly in a
refrigerator than an identical carton left on a
work surface in a kitchen.
answer
F
5
This experiment was carried out to investigate what
happens when different substances are heated, and
then allowed to cool
In which test tube did a chemical
reaction take place on heating?
B
answer
6
D
answer
7
C
answer
8
Decreases / Slower reaction
answer
9
B
answer
10
C
answer
11
D
answer
12
answer
Sodium and chlorine
13
answer
D
14
answer
C
15
answer
S03
16
Metal
non-metal
Conductor
non- conductor
conductor
metal
answer
Aluminium is a __________ and is a ________________.
17
answer
18g
18
B
answer
19
answer
A
20
answer
A
21
A
B
C
D
potassium hydroxide
sulphuric acid
potassium sulphate
water
C
answer
22
Increase / Move towards pH 7
answer