1999 - JAMB Chemistry Past Questions and Answers - page 5

41
POlyvinyl chloride is used to produce
A
bread
B
pencils
C
ink
D
pipes
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42
An organic compound that does not undergo a reaction with both hydrogen cyanide and hydroxylamine can be
A
alkene
B
alkanal
C
alkanone
D
alkanoic acid
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43
When the two end alkyl groups ethyl ethanoate are interchange, the compound formed is known as
A
methyl ethanoate
B
ethyl propanaote
C
methyl propanoate
D
propyl ethanoate
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44
From the diagram above the mass of crystals deposited when 1 dm 3 of a saturated solution of NaCl is cooled from 80 oC to 60oC is
[Na = 23, Cl = 35.5]
A
117.00 g
B
58.50 g
C
11.70 g
D
5.85 g
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45
In the diagram above, Y is a mixture of
A
calcium hydroxide and ammonium chloride
B
calcuim hydroxide and sodium chloride
C
sodium chloride and ammonuim trioxonitrate (V)
D
sodium dioxonitrate (lll) and ammouium chloride
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46
Use the table above to answer this question . The element that is likely to participate in covalent rather than ionic bonding is
A
Z
B
Y
C
X
D
W
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47
Use the table above to answer this question .The least reactive element is
A
W
B
X
C
Y
D
Z
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48
In the diagram above, the mixture of the solids P and Q can be separated by
A
distillation
B
fractional distillation
C
crystallization
D
fractional crystallization
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49
Which of the compounds above would react to take up two molecules of bromine durng bromination?
A
l only
B
lll only
C
l and ll only
D
ll and lll only
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