Chemistry Past Paper Questions

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Q 311:The major constituents of troposphere are Nitrogen and:
A
Oxygen
B
Hydrogen
C
Carbon dioxide
D
Argon
Sahiwal, 2019
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Q 312:Which one gas was prepared by Haber's process:
A
Hydrogen
B
Nitrogen
C
Ammonia
D
Methane
Sahiwal, 2019
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Q 313:Which one is the lewis base:
A
AlCl3
B
H+
C
NH3
D
BF3
Sahiwal, 2019
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Q 314:The mass of one molecule of water is:
A
18 amu
B
18 gm
C
18 mg
D
18 kg
Sahiwal, 2019
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Q 315:The most abundant element occuring in the ocean is:
A
Oxygen
B
hydrogen
C
Nitrogen
D
Silicon
Sahiwal, 2019
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Q 316:The most common example of corrosion is:
A
Chemical Decay
B
Rusting of Iron
C
Rusting of aluminium
D
Rusting of tin
Sahiwal, 2019
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Q 317:The oxidation number of hydrogen in metal hydrides is:
A
-1
B
-2
C
+3
D
+1
Sahiwal, 2019
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Q 318:The oxidation number of sulphur in H2SO4 is:
A
+6
B
+7
C
+8
D
+10
Sahiwal, 2019
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Q 319:The vertical columns in the Periodic Table are called:
A
periods
B
groups
C
rows
D
blocks
Sahiwal, 2019
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Q 320:Tyndall effect is shown by:
A
chalk solution
B
paints
C
Sugar solution
D
jelly
Sahiwal, 2019
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Total MCQs: 1548Page 32 of 155
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