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
correct option: d
Users' Answers & Comments2
Ammonium chloride can be separated from its mixture with common salt by
A
Distillation
B
Evaporation
C
Decantation
D
Sublimation
correct option: d
Users' Answers & Comments3
The ability of carbon to form long chains is referred to as
A
Alkylation
B
Acylation
C
Carbonation
D
Catenation
correct option: d
Users' Answers & Comments4
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
correct option: a
Users' Answers & Comments5
The relative atomic mass of a naturally occurring lithium consisting of 90%\(\frac{7}{3}\)Li and 10%\(\frac{6}{3}\)Li is
A
6.2
B
6.8
C
7.1
D
6.9
correct option: d
(\(\frac{90}{100}\) x 7) + (\(\frac{10}{100}\) x 6)
= 6.3 + 0.6 = 6.9
Users' Answers & Comments= 6.3 + 0.6 = 6.9
6
The colour of litmus in an alkaline medium is
A
Red
B
Yellow
C
Pink
D
Blue
correct option: d
Users' Answers & Comments7
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
correct option: c
Users' Answers & Comments8
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
correct option: d
Users' Answers & Comments9
The process that requires the use of hardwater in its operation is
A
Tanning
B
Bottling
C
Laundry
D
Dyeing
correct option: b
Users' Answers & Comments10
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
correct option: c
2g NaOH is contained in 100cm3
Xg NaOH is contained in 1000cm3
Xgram = \(\frac{2\times 1000}{100}\) = 20g
Mole = \(\frac{20}{40}\) = 0.50mol/dm3
Users' Answers & CommentsXg NaOH is contained in 1000cm3
Xgram = \(\frac{2\times 1000}{100}\) = 20g
Mole = \(\frac{20}{40}\) = 0.50mol/dm3