1995 - JAMB Chemistry Past Questions and Answers - page 4
31
Which of the following compounds will impart a brick-red colour to a non-luminious bunsen flame?
A
NaCl
B
LiCl
C
CaCl2
D
MgCl2
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32
Group 1 A metals are not found free in nature because they?
A
are of low melting and boiling points
B
have weak metallic bonding
C
conduct electricity and heat
D
are very reactive
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33
CHCl3 + Cl2 → HCl + CCl4. The reaction above is an example of?
A
an addition reaction
B
a substitution reaction
C
a chlorination reaction
D
a condensation reaction
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34
Which of the following pairs has compounds that are isomers?
A
Propanal and propanone
B
Ethanoic acid and ethylmethanoate
C
Ethanoic acid and ethane-1, 2-diol
D
2-methylbutane and 2, 2-dimethylbutane
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35
Aromatic and aliphatic hydrocarbons can be distinguished from each other by the?
A
action of bromine
B
use of polymerization reaction
C
action of heat
D
use of oxidation reaction
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36
The role of sodium chloride in the preparation of soap is to?
A
purify the soap
B
separate the soap from glycerol
C
accelerate the decomposition of the fat or oil
D
react with glycerol
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37
CxHY + 4O2 → 3CO2 + 2H2O. The hydrocarbon, CxHY, in the reaction above is?
A
propane
B
propene
C
propyne
D
propanone
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38
An example of a secondary amine is?
A
propylene
B
di-butylamine
C
methylamine
D
trimethylamine
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39
The relatively high boiling points of alkanols are due to?
A
ionic bonding
B
aromatic character
C
covalent bonding
D
hydrogen bonding
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40
A
M and E
B
G and E
C
R and L
D
G and L
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