2000 - JAMB Chemistry Past Questions and Answers - page 5
41
Powdered marble reacts faster with hydrochloric acid solution than the granular form because the powdered form has
A
more molecules
B
more atoms
C
larger surface area
D
relatively large mass
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42
N2(g) + O2(g) ↔ 2NO(g); ΔH = + 180.6 kJ mol-1
In the reaction above, increase in temperature will
In the reaction above, increase in temperature will
A
increase the quantity of N2
B
increase in the yield of NO
C
decrease the yield of NO
D
decrease the quantity of O2
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43
For a reaction in equilibrium, the species involved in the equilibrium constant expression are
A
gaseous and solid species
B
liquid and solid species
C
solid and dissolved species
D
gaseous and dissolved species
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44
A phenomenon where an element exist in different forms in the same physical state is known as
A
isomerism
B
amorphism
C
allotropy
D
isotopy
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45
The substance often use for vulcanization of rubber is
A
chlorine
B
hydrogen peroxide
C
sulphur
D
tetraoxosulphate (IV) acid
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46
A gas that is not associated with global warming is
A
CO2
B
SO3
C
CH4
D
H2
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47
The refreshing and characteristic taste of soda water and other soft drinks is as a result of the presence in them of
A
carbon (IV) oxide
B
carbon (II) oxide
C
soda
D
glucose
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48
A form of carbon used for absorbing poisonous gases and purification of noble gases is
A
wood charcoal
B
animal charcoal
C
carbon fibres
D
carbon black
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49
Synthesis gas is a mixture of
A
CH4 and H2O
B
CH4 and H2
C
CO2 and H2
D
CO and H2
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50
Potassium vapour burns with a
A
blue flame
B
brick-red flame
C
violet flame
D
golden-yellow flame
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