2002 - JAMB Chemistry Past Questions and Answers - page 4
31
A red precipitate of copper (I) carbide is formed when ammonium solution of copper (I) chloride is introduced into
A
CH3CH2CH2CH3
B
CH2 = CH - CH2CH3
C
CH3CH2 - C = CH
D
CH3 - C = C - CH3
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32
The boiling of fat and aqueous caustic soda is referred to as
A
hydrolysis
B
esterification
C
acidification
D
saponification
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33
The most important use of hydrogen is in the
A
manufacture of ammonia
B
manufacture of methyl alcohol
C
manufacture of ethyl alcohol
D
hydrogenation of oils
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34
which of the following polymers is suitable for packaging and electrical insulation?
A
polyamide
B
polyethene
C
polycarbonate
D
polystyrene
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35
Hydrogen is readily released when dilute hydrochloric acid reacts with
A
Cu
B
Na
C
Au
D
Ag
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36
The intermediate product formed when ethanol is progressively oxidized to ethanoic acid with potassium heptaoxodichromate (IV) is
A
butanal
B
ethanal
C
methanal
D
propanal
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37
A rock sample was added to cold dilute HNO3. The gas evolved was passed into a solution of acidified K2Cr2O7 and the solution turned green. The sample contains
A
Cl-
B
NO3-
C
SO32-
D
SO42-
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38
Which of the following statement is true of a proton?
A
The mass of a proton is 1840 times the mass of electron
B
the total mass of the protons in a particular nucleus is always half the nuclear size
C
The mass of a proton is one - twelfth the molar mass of carbon
D
The mass of a proton is 1.0008g
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39
Which of the following chloride would exhibit the least ionic character?
A
MgCl2
B
CaCl2
C
LiCl
D
AlCl3
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40
A fixed mass of gas has a volume of 92cm3 at 3 oC. When will be its volume at 18 oC if the pressure remains constant
A
15.3cm3
B
87.3cm3
C
552.0cm3
D
97.0cm3
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