2007 - JAMB Chemistry Past Questions and Answers - page 5
41
The IUPAC nomenclature of compound CH3CH2COOCH2CH3 is
A
propyl ethanoate
B
ethyl butanoate
C
ethyl propanoate
D
methyl butanoate
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42
When temporary hard water is boiled for sometime in a kettle, the inner surface of the kettle becomes coated with a deposit of
A
calcium tetraoxosulphate(VI)
B
calcium trioxocarbonate (IV)
C
calcium hydrogentrioxocarbonate (IV)
D
aluminium trioxocarbonate (IV)
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43
A supersaturated solution is said to contain
A
more solute than it can dissolve at that temperature in the presence of undissolved solute
B
as much solute as it can dissolve at that temperature in the presence of undissolved solute
C
as much solute as it can dissolve at that temperature
D
more solute than it can dissolve at that temperature
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44
The presence of nitrogen in air is to slow down
A
respiration and combustion
B
combustion and corrosion
C
corrosion and respiration
D
respiration and transpiration
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45
A good drying agent should be
A
deliquescent
B
effervescent
C
hygroscopic
D
efflorescent
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46
Smog usually occurs over cities which
A
burn a lot of fossil fuels
B
have very few plants
C
are surrounded by water
D
are overpopulated
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47
What weight of NaCl is needed to make 2.0 dm3 of a 1.5M solution?
[Na = 23, Cl = 35.5]
[Na = 23, Cl = 35.5]
A
116 g
B
175 g
C
87 g
D
58 g
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