2004 - JAMB Chemistry Past Questions and Answers - page 2
11
The property of chlorine which causes hydrogen chloride to be more ionic than the chlorine molecules is its
A
electrovalency
B
electron affinity
C
electropositivity
D
electronegativity
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12
Chlorine consisting of two isotopes of mass number 35 and 37 in the ratio 3:1 has an atomic mass of 35.5. Calculate the relative abundance of the isotopes of mass number 37
A
20
B
25
C
60
D
75
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13
Which of the following mixture of gases is likely to burn in flame
A
neon and hydrogen
B
nitrogen and helium
C
helium and neon
D
neon and nitrogen
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14
Hardness of water is caused by the presence of ions of
A
magnesium and silver
B
cacium and magnesium
C
sodium and potassium
D
calcium and sodium
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15
Pollution of underground water by metal ions is very likely in the soil that has high
A
acidity
B
alkalinity
C
chloride content
D
nitrate content
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16
A carcinogenic substance is
A
asbestos dust
B
sawdust
C
nitrogen (II) oxide
D
carbon (II) oxide
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17
The solubility in mol dm/-3 of 20g of CuSO4 dissolved in 100g of water at 180o is
[Cu = 64, S = 32, O =16]
[Cu = 64, S = 32, O =16]
A
0.13
B
0.25
C
1.25
D
2.00
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18
Calcium tetraoxosulphate (VI) dissolves in water only sparingly to form a
A
solution
B
suspension
C
precipitate
D
colloid
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19
Which of the following compound is a normal salt?
A
NaHS
B
NaHSO4
C
NaHCO3
D
Na2CO3
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20
What volume of 0.5 mol dm-3 H2SO4 will exactly neutralize 20cm3 of 0.1 mol dm-3 NaOH solution?
A
2.0 cm3
B
5.0 cm3
C
6.8 cm3
D
8.3 cm3
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