Chemistry Past Paper Questions

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Q 971:The units of equilibrium constant kc for reaction in the balance chemical equation N2 +3H2 ⇌ 2NH3 are:
A
mol dm-3
B
mol-1 dm-3
C
mol-2 dm6
D
No units
Lahore, 2017
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Q 972:The units of molar concentration are:
A
mol-1dm-3
B
mol-1dm3
C
mol dm3
D
mol dm-3
Lahore, 2017
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Q 973:Which acid is used as an electrolyte in lead storage batteries:
A
Citric acid
B
Formic Acid
C
Uric acid
D
Sulphuric acid
Lahore, 2017
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Q 974:Which fraction of the following is used as jet fuel:
A
Kerosene Oil
B
Lubricating oil
C
Fuel oil
D
Petroleum ether
Lahore, 2017
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Q 975:Which gas protects earth's surface from ultraviolet radiations:
A
O3
B
CO2
C
CO
D
N2
Lahore, 2017
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Q 976:The shortest period of periodic table is:
A
Fourth
B
Third
C
Second
D
First
Lahore, 2017
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Q 977:Which one of the following halogens has lowest electronegativity:
A
Fluorine
B
Chlorine
C
Bromine
D
Iodine
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Q 978:Which one of the following is not amorphous solid:
A
Rubber
B
Plastic
C
Glass
D
Glucose
Lahore, 2017
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Q 979:Transition elements are:
A
All gases
B
All metals
C
All non-metals
D
All metalloids
Lahore, 2017
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Q 980:Triple covalent bond involves how many electrons:
A
Eight
B
Six
C
Four
D
Only three
Lahore, 2017
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Total MCQs: 1548Page 98 of 155
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