2004 - JAMB Chemistry Past Questions and Answers - page 5

41
An isomer of C5H12 is
A
Butane
B
2 – methylbutane
C
2 – methylpropane
D
2 – ethylbutane
correct option: b
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42
A characteristic of the alkane family is
A
Addition reaction
B
Elimination reaction
C
Substitution reaction
D
Neutralization reaction
correct option: c
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43
Which of these reagents can confirm the presence of a triple bond?
A
Bromine water
B
Acidified KMnO4
C
Copper (I) chloride
D
Bromine gas
correct option: c
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44
Vulcanization involves the removal of
A
A monomer
B
The single bond
C
The double bond
D
A polymer
correct option: c
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45
CH3COOH(g) → H4(g) + CO2(g)
The reaction above is
A
Carboxylation
B
Decarboxylation
C
Acidification
D
Esterification
correct option: b
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46
C2H5OH(aq) → Y
If the above reaction takes place in conc. H2SO4 at 180o, Y represents
A
CH4
B
C2H5COOH
C
C2H4
D
CH3OCH3
correct option: c
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47
Alkanol + Alkanoic ↔ Ester + Water
The reverse reaction above is known as
A
Hydrolysis
B
Saponification
C
Hydration
D
Fermentation
correct option: a
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48
In the production of soap, concentrated sodium chloride solution is added to
A
Increase the solubility of soap
B
Decrease the solubility of the soap
C
Saponify the soap
D
Emulsify the soap
correct option: b
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49
In the experiment above, X is a mixture of nitrogen, carbon (IV) oxide and
A
water
B
impurities
C
inert gas
D
oxygen
correct option: c
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50
The IUPAC nomenclature of the compound above is
A
2-ethylpentane
B
3,4-dimethylhexane
C
2,3-dimethylhexane
D
2-ethylhexane
correct option: b
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