2022 - JAMB Chemistry Past Questions and Answers - page 2
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
cu\(^{2+}\)
sn\(^{2+}\)
fe\(^{2+}\)
zn\(^{2+}\)
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The addition of charcoal to the filter bed of sand during water treatment for city supply is to?
prevent goiter
prevent tooth decay
remove odour
kill germs
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Using the metal activity series, the metal that can liberate hydrogen gas from steam is?
iron
copper
tin
lead
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An organic compound with a fishy smell is likely to have a general formula ___
RCONHR\(^1\)
A. RCONH\(_2\)
RNH\(_2\)
RCOR\(^1\)
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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\(_4\)?
Low temperature and high pressure
Low temperature and low pressure
high temperature and low pressure
high temperature and high pressure
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Zn + 2HCL → ZnCl\(_2\) + H\(_2\)
What happens to zinc in the above reaction?
oxidized
a reactant
reduced
a metal
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An organic functional group which would likely decolourize ammoniacal silver nitrate is?
alkene
alkane
alkyne
alkanol
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A coloured gas that is known to be poisonous and can readily damage the mucous lining of the lungs is?
hydrogen sulphide
carbon(ii)oxide
chlorine
sulphur(iv)oxide
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In order to electroplate spoon with silver, the arrangement of the electrolytic cell is?
the anode is a silver rod and the cathode is the spoon
the anode is the spoon and the cathode is a silver rod
the electrolyte is silver trioxonitrate(v)( solution and the cathode is a silver rod.
the electrolyte is silver trioxonitrate(v) solution and the anode is the spoon
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An organic compound which decolorizes bromine water is likely to be?
C\(_3\)H\(_8\)
C\(_2\)H\(_6\)
C\(_4\)H\(_10\)
C\(_2\)H\(_4\)
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