Chemistry Past Paper Questions

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Q 1461:Dehydration of alcohols can be carried out with:
A
NaOH
B
KOH
C
HCl
D
H2SO4
Sahiwal, 2016
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Q 1462:For a reaction between PCl3 and Cl2 to form PCl5 the units of Kc are:
A
mol dm-3
B
mol-1dm-3
C
mol-1dm3
D
mol dm3
Sahiwal, 2016
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Q 1463:For the reaction between PCl3 and Cl2 to form PCl5 the units of Kc are:
A
mol dm-3
B
mol-1 dm-3
C
mol-1 dm3
D
mol dm3
Sahiwal, 2016
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Q 1464:General formula of carbohydrates is:
A
Cn2n
B
Cn(H2O)n
C
Cn(OH)n
D
None of these
Sahiwal, 2016
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Q 1465:If Qc < Kc what will be the direction of reaction?
A
Forward
B
Reverse
C
Equilibrium state
D
None of these
Sahiwal, 2016
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Q 1466:Just above the Earth's surface is:
A
Mesosphere
B
Stratosphere
C
Thermosphere
D
Troposphere
Sahiwal, 2016
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Q 1467:Non-metals are generally soft but which one of the following is extremely hard.
A
Graphite
B
Phosphorus
C
Iodine
D
Diamond
Sahiwal, 2016
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Q 1468:In long form of periodic table, the electronic configuration is based upon.
A
Atomic number
B
Mass number
C
Block number
D
Neutron number
Sahiwal, 2016
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Q 1469:Formation of water from hydrogen and oxygen is:
A
redox reaction
B
acid-base reaction
C
neutralization
D
decomposition
Sahiwal, 2016
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Q 1470:Formula mass of sodium chloride is:
A
57.5
B
58.5
C
35.5
D
38.5
Sahiwal, 2016
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Total MCQs: 1548Page 147 of 155
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