2022 - JAMB Chemistry Past Questions and Answers - page 2
11
On the basis of the electrochemical series, which of these ions will show the greater tendency to be discharged at the cathode in an electrolytic cell
A
cu\(^{2+}\)
B
sn\(^{2+}\)
C
fe\(^{2+}\)
D
zn\(^{2+}\)
12
The addition of charcoal to the filter bed of sand during water treatment for city supply is to?
A
prevent goiter
B
prevent tooth decay
C
remove odour
D
kill germs
13
Using the metal activity series, the metal that can liberate hydrogen gas from steam is?
A
iron
B
copper
C
tin
D
lead
14
An organic compound with a fishy smell is likely to have a general formula ___
A
RCONHR\(^1\)
B
A. RCONH\(_2\)
C
RNH\(_2\)
D
RCOR\(^1\)
15
N\(_2\)O\(_4\) ⇔ 2NO\(_2\)     (Δ = -ve)
From the reaction above, which of these conditions would produce the highest equilibrium yield for N\(_2\)O\(_4\)?
A
Low temperature and high pressure
B
Low temperature and low pressure
C
high temperature and low pressure
D
high temperature and high pressure
16
Zn + 2HCL → ZnCl\(_2\) + H\(_2\)Â
What happens to zinc in the above reaction?
A
oxidized
B
a reactant
C
reduced
D
a metal
17
An organic functional group which would likely decolourize ammoniacal silver nitrate is?
A
alkene
B
alkane
C
alkyne
D
alkanol
18
A coloured gas that is known to be poisonous and can readily damage the mucous lining of the lungs is?
A
hydrogen sulphide
B
carbon(ii)oxide
C
chlorine
D
sulphur(iv)oxide
19
In order to electroplate spoon with silver, the arrangement of the electrolytic cell is?
A
the anode is a silver rod and the cathode is the spoon
B
the anode is the spoon and the cathode is a silver rod
C
the electrolyte is silver trioxonitrate(v)( solution and the cathode is a silver rod.
D
the electrolyte is silver trioxonitrate(v) solution and the anode is the spoon
20
An organic compound which decolorizes bromine water is likely to be?
A
C\(_3\)H\(_8\)
B
C\(_2\)H\(_6\)
C
C\(_4\)H\(_10\)
D
C\(_2\)H\(_4\)
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