2016 - JAMB Chemistry Past Questions and Answers - page 1
1
The principle of column chromatography is based on th ability of the constituents to
A
React with the solvent in the column
B
React with each other in the solvent in the column
C
Dissolve in each other in the column
D
Move at different speeds in the column
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2
Ammonium chloride can be separated from its mixture with common salt by
A
Distillation
B
Evaporation
C
Decantation
D
Sublimation
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3
The ability of carbon to form long chains is referred to as
A
Alkylation
B
Acylation
C
Carbonation
D
Catenation
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4
The industrial preparation of hydrogen gas from water gas is referred to as
A
Bosch process
B
Contact process
C
Haber process
D
Bayer Process
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5
The relative atomic mass of a naturally occurring lithium consisting of 90%
A
6.2
B
6.8
C
7.1
D
6.9
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6
The colour of litmus in an alkaline medium is
A
Red
B
Yellow
C
Pink
D
Blue
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7
The compounds CH3CH2CHO and CH3COCH3 can be distinguished from each other using
A
Dilute ammonia
B
Benedict's solution
C
Tollen's reagent
D
Sodium hydroxide solution
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8
Which of the following statements is true about 2-methylpropane and butane
A
They have different number of carbon atoms
B
They are members of same homologous series
C
They have the same boiling points
D
They have the same chemical properties
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9
The process that requires the use of hardwater in its operation is
A
Tanning
B
Bottling
C
Laundry
D
Dyeing
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10
What is the concentration of a solution containing 2g of NaOH in 100cm3 of solution?
[Na=23, O=16, H=1]
[Na=23, O=16, H=1]
A
0.05 moldm-3
B
0.30 moldm-3
C
0.50 moldm-3
D
0.40 moldm-3
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