2011 - JAMB Chemistry Past Questions and Answers - page 1
1
Hardness of water is mainly due to the presence of
A
calcium hydroxide or magnesium hydroxide
B
calcium trioxocarbonate (IV) or calcium tetraoxosulphate (VI)
C
sodium hydroxide or magnesium ydroxide
D
calcium chloride or sodium chloride salts
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2
A suitable solvent for iodine and nephthalene is
A
carbon (IV) sulphide
B
ethanol
C
water
D
benzene
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3
Which of the following noble gases is commonly found in the atmosphere?
A
Xenon
B
Neon
C
Helium
D
Argon
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4
N2O4(g) ↔ 2NO2(g) ΔH = +ve
In the reaction above, an increase in temperature will
A
increase the value of the equilibrium constant
B
decreases the value of the equilibrium constant
C
increase in the reactant production
D
shift the equilibrium to the left
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5
CH3COOH(aq) + OH-(aq) ↔ CH3COO-(aq) + H2O(l)
In the reaction above ,CH3COO-(aq) is
A
conjugate base
B
acid
C
base
D
conjugate acid
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6
How many cations will be produced from a solution of potassium aluminium tetraoxosulphate (VI)?
A
3
B
4
C
1
D
2
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7
Which of the following is NOT an alkali?
A
NH3
B
Mg(OH)2
C
Ca(OH)2
D
NaOH
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8
An effect of thermal pollution on water bodies is that the
A
volume of water reduces
B
volume of chemical waste increase
C
level of oxides of nitrogen increase
D
level of oxygen reduces
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9
Which of the following is a deliquescent compound?
A
Na2CO3
B
CaCl2
C
CuO
D
Na2CO3.10H2O
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10
A chemical reaction which the hydration energy is greater than the lattice energy is referred to as
A
a spontaneous reaction
B
an endothermic reaction
C
an exothermic reaction
D
a reversible reaction
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