Chemistry Past Paper Questions

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Q 1321:Main component of natural gas is:
A
Methane
B
Propane
C
Butane
D
Propyne
Lahore, 2016
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Q 1322:Matte is a mixture of:
A
FeS and CuS
B
Cu2O and FeO
C
Cu2S and FeS
D
Cu2S and FeO
Lahore, 2016
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Q 1323:Oxidation of alkenes produce:
A
Glyoxal
B
Oxalic acid
C
Glycol
D
Formic acid
Lahore, 2016
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Q 1324:Permanent hardness is removed by adding:
A
Sodium zeolite
B
Soda line
C
Lime water
D
Quick lime
Lahore, 2016
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Q 1325:Reaction between acid and base forms:
A
Salt and water
B
Salt and gas
C
Salt and acid
D
Salt and base
Lahore, 2016
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Q 1326:Such reactions which continue in both directions are called:
A
Irreversible
B
Reversible
C
Non-reactive
D
Dynamic
Lahore, 2016
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Q 1327:Temporary hardness is because of:
A
Ca(HCO₃)₂
B
CaCO3
C
MgCO₃
D
MgSO₄
Lahore, 2016
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Q 1328:Modern periodic law is presented by:
A
Doberiner
B
Newlands
C
Mendeleev
D
H. Moseley
Lahore, 2016
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Q 1329:Oxidation number of nitrogen in HNO3 is:
A
+3
B
+5
C
-3
D
+6
Lahore, 2016
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Q 1330:Oxidation number of oxygen in OF2 is:
A
-1
B
+1
C
-2
D
+2
Lahore, 2016
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Total MCQs: 1548Page 133 of 155
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