2011 - JAMB Chemistry Past Questions and Answers - page 3
21
In the laboratory preparation of oxygen, dried oxygen is usually collected over
A
hydrochloric acid
B
mercury
C
calcium chloride
D
tetraoxosulphate (VI) acid
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22
The property of concentrated H2SO4 that makes it suitable for preparing HNO3 is its
A
boiling point
B
density
C
oxidizing properties
D
dehydrating properties
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23
Bronze is preferred to copper in the making of medals because it
A
is stronger
B
can withstand low temperature
C
is lighter
D
has low tensile strength
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24
The constituents of baking powder that makes the dough to rise is
A
NaHCO3
B
NaOH
C
Na2CO3
D
NaCl
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25
The ability of carbon to form long chains is referred to as
A
alkylation
B
acylation
C
catenation
D
carbonation
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26
Which of the following compounds will undergo polymerization reaction?
A
C2H4
B
C2H5COOH
C
C2H6
D
C2H5OH
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27
A
geometric isomerism
B
optical isomerism
C
structural isomerism
D
positional isomerism
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28
An organic compound has an empirical formula CH2O and vapour density of 45.
What is the molecular formula?
[C = 12, H = 1, O = 16]
What is the molecular formula?
[C = 12, H = 1, O = 16]
A
C3H7OH
B
C2H5OH
C
C3H6O3
D
C2H4O2
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29
At 25o and zymase as catalyst,
C6H126 → 2C2H5OH + 2CO2 + energy
The reaction above represented by the equation above is useful in the production of
C6H126 → 2C2H5OH + 2CO2 + energy
The reaction above represented by the equation above is useful in the production of
A
propanol
B
butanol
C
methanol
D
ethanol
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30
The number of isomers that can be obtained from C4H10 is
A
3
B
4
C
1
D
2
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