Chemistry Past Paper Questions

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Q 1081:Which one of them is the oxidation number of Cr in K2Cr2O7?
A
3
B
4
C
5
D
6
Rawalpindi, 2017
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Q 1082:Which one the following is di-atomic molecule?
A
SO2
B
H2O
C
CCl4
D
H2
Rawalpindi, 2017
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Q 1083:Who discovered the neutron?
A
Neil Bohr
B
J.J Thomson
C
Chadwick
D
Goldstein
Rawalpindi, 2017
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Q 1084:About 99% of atmospheric mass lies within:
A
30 km
B
35 km
C
15 km
D
11 km
Sahiwal, 2017
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Q 1085:Alkenes are also known as
A
Methane
B
Paraffins
C
Olefins
D
Acetylene
Sahiwal, 2017
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Q 1086:Bronsted- Lowry presented the concept of acids and bases
A
1787 AD
B
1823 AD
C
1923 AD
D
1943 AD
Sahiwal, 2017
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Q 1087:Buildings are being damaged by acid rain because it attacks on:
A
Calcium carbonate
B
Calcium sulphate
C
Calcium oxalate
D
Calcium nitrate
Sahiwal, 2017
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Q 1088:Functional group of alcohols is:
A
C=O
B
-COH
C
C-O-C
D
OH
Sahiwal, 2017
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Q 1089:Gases are the lightest form of matter and their densities are expressed in term of:
A
mg/cm3
B
g/cm3
C
g/dm-3
D
kg/dm-3
Sahiwal, 2017
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Q 1090:Ice floats on water because ice is crystalline in nature:
A
Ice is denser than water
B
Ice is crystalline in nature
C
Water is denser than ice
D
Water Molecules move Randomly
Sahiwal, 2017
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Total MCQs: 1548Page 109 of 155
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