Chemistry Past Paper Questions

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Q 391:Nitrogen and Hydrogen react to make Ammonia. What will be present in the equilibrium mixture: N2 + 3H2 ⇌ 2NH3 Kc = 2.86 mol-2 dm6
A
Only NH3
B
H2, N2, and NH3
C
N2 and H2
D
Only H2
Bahawalpur, 2018
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Q 392:Normally rain water is weakly acidic because of:
A
CO2 gas
B
SO3 gas
C
SO2 gas
D
NO2 gas
Bahawalpur, 2018
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Q 393:Permanent hardness is removed by adding:
A
Na2-zeolite
B
Soda lime
C
Lime water
D
Quick lime
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Q 394:Pitch is the black residue of :
A
Coke
B
Coal Tar
C
Coal
D
Coal Gas
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Q 395:Specific heat capacity of water is:
A
4.2KJg-1K-1
B
4.2Jg-1K-1
C
2.4KJg-1K-1
D
2.4Jg-1K-1
Bahawalpur, 2018
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Q 396:One amu (Atomic Mass Unit) is equivalent to:
A
1.66 x 10-24 mg
B
1.66 x 10-24 g
C
1.66 x 10-24 Kg
D
1.66 x 10-23 g
Bahawalpur, 2018
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Q 397:Oxidation Number of Sulphur in H2SO4 is:
A
+2
B
+7
C
+14
D
+6
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Q 398:Non-Metals are generally soft, but one of the following extremely hard:
A
Graphite
B
Phosphorus
C
Iodine
D
Diamond
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Q 399:Mist is an example of Solution:
A
Liquid in Gas
B
Solid in Gas
C
Gas in Liquid
D
Gas in Solid
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Q 400:Mist is an example of which Solution:
A
Liquid in Gas
B
Gas in Liquid
C
Solid in Gas
D
Gas in Solid
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Total MCQs: 1548Page 40 of 155
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