1999 - WAEC Chemistry Past Questions and Answers - page 4
31
Equal volumes of water were added to one mole of each of the following compounds. Which of them produced the largest number of ions
A
Glucose
B
Sodium trioxonitrate (V)
C
Ethananoic acid
D
Silver chloride
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32
When dilute copper (ll) chloride solution is electrolysed, the reaction at the cathode is represented by the equation
A
Cu → Cu2+ + 2e-
B
Cu2+ + 2e- → Cu
C
40H- - 4e- → O2 + 2H2O
D
2CI- → CI2 + 2e
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33
How many carbon atoms are present in one molecule of 2-methylpropane?
A
2
B
3
C
4
D
5
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34
Which of the following is the most reactive towards bromine?
A
Methane
B
Benzene
C
Ethyne
D
Hexane
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35
Which of the following compounds is unsaturated?
A
2-methylbutane
B
Chloromethane
C
Methylbenzene
D
1,2-dibromoethane
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36
Which of the following compounds reacts with sodium hydroxide to form a salt?
A
CH 3CH 2COOH
B
(CH3) 3COH
C
CH3CH=CH 2
D
C 6H 12O 6
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37
Alkanoates are produced from alkanols by
A
fermentation
B
saponification
C
oxidation
D
esterification
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38
Which of the following is a secondary alkanol?
A
OHCI2-CH2OH
B
H2C=CH-CH2OH
C
CH 3-CH(OH)-CH 3
D
CH3-(CH2)3-CH2OH
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39
Geometric (cis-trans) isomerism is exhibited by
A
C 2H 2CI 2
B
CH2CI5
C
C 4H 10
D
C5H12
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40
Which of the following is needed to produce slag during the extraction of iron in the blast furnace?
A
Cryolite
B
Limestone
C
Carbon
D
Sulphur
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