2007 - JAMB Chemistry Past Questions and Answers - page 4
31
A metal X forms two bromides with the formulae XBr2 and XBr3. What type of bonding exists between X and bromine in the bromide?
A
Ionic bonding
B
Metallic bonding
C
Dative bonding
D
Covalent bonding
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32
A mixture of petrol and water can be separated through
A
centrifugation
B
distillation
C
the use of separating funnel
D
the use of filter paper
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33
Which of the following represents an aromatic compound?
A
C6H5OH
B
C6H12
C
C6H9OH
D
C6H8
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34
CH3CH2Cl + KCN → CH3CH2CN + KCl
In the reaction above, the cyanide is
In the reaction above, the cyanide is
A
hydrophobic
B
hydrophilic
C
nucleophilic
D
electrophilic
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35
Which of the following compounds is the best possible anti-knock agent for petrol?
A
(CH3)2CH - CH(CH3)CH2CH3
B
CH3CH2(CH3)CHCH2CH2CH3
C
CH3CH2(CH3)CHCH2CH2CH3
D
(CH3)3C - CH2CH2CH3
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36
The hydrocarbon used in the production of styrene is
A
ethyne
B
propyne
C
ethane
D
ethene
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37
How many structural isomers of chlorobutane are possible?
A
4
B
3
C
2
D
1
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38
The conversion of open chain alkanes into cycloalkanes and aromatic compounds is called
A
cracking
B
reforming
C
isomerization
D
polymerization
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39
Which of the following alkanes has the highest boiling point?
A
Pentane
B
Ethane
C
Propane
D
Methane
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40
Certain useful waxes are composed mainly of
A
amino acids
B
glycerols
C
alkanols
D
alkanoates
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