2015 - JAMB Chemistry Past Questions and Answers - page 1
1
The filter in the cigarette reduce the nicotine construct by
A
burning
B
absorption
C
evaporation
D
absorption
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2
Which of these require crystallization most?
A
Drug making
B
Cement making
C
Paint making
D
Perfume making
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3
Iron is often galvanized in order to
A
Make it more malleable
B
Remove the impurities unit
C
Protect it against corrosion
D
Render it passive
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4
In the industrial production of H2 is removed by (solution)
A
washing under pressure
B
drying over phosphorus (V) oxide
C
passing the mixture to the limewater
D
using ammonical copper (I) chlorine
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5
The gas that is most useful in protecting humans against solar marathon is
A
chlorine
B
ozone
C
carbon IV oxide
D
hydrogen sulphur
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6
Vulcanization involve the removal of
A
monometer
B
the single bond
C
the double bond
D
a polymer
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7
The acid in electrolysis of water is dilute
A
HNO3
B
CH3COOH
C
H2SO
D
HCl
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8
A small quantity of solid ammonium chloride (NH4Cl) texted gently in a test tube, the solid gradually disappear produce two gases. Later, a white cloudy deposit was absence on the cooler part of the test tube. The ammonium chloride is to have undergo
A
distillation
B
sublimation
C
precipitation
D
evaporation
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9
When salt loses its water of crystallization to the atmosphere on exposure, the process is said to be
A
efflorescence
B
déliquescence
C
effervescence
D
fluorescence
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10
Atomicity of ozone is
A
1
B
2
C
3
D
4
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