Chemistry Past Paper Questions

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Q 11:Just above the Earth's Surface is:
A
Mesosphere
B
Stratosphere
C
Thermosphere
D
Troposphere
Bahawalpur, 2019
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Q 12:Matte is mixture of:
A
Cus and Fes
B
FeO and Cu₂O
C
FeS and Cu₂S
D
FeO and CuS
Bahawalpur, 2019
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Q 13:Molecular Formula of Mohr's Salt is:
A
ZnSO4
B
FeSO4 (NH4)2 SO4 6H2O
C
NaH2PO4
D
K2SO4 Fe2 (SO4)3 24 H2O
Bahawalpur, 2019
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Q 14:Normally Rain Water is Weakly Acidic Because of:
A
O3
B
CO2
C
O2
D
N2
Bahawalpur, 2019
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Q 15:Temporary Hardness is because of:
A
Ca(HCO₃)₂
B
CaCO₃
C
MgCO₃
D
MgSO₄
Bahawalpur, 2019
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Q 16:Pitch is black Residue of this:
A
Coke
B
Coal tar
C
Coal
D
Coal Gas
Bahawalpur, 2019
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Q 17:Spontaneous Chemical Reaction takes place in:
A
Down's Cell
B
Nelson's cell
C
Galvanic Cell
D
Electrolytic Cell
Bahawalpur, 2019
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Q 18:One atmospheric Pressure is equal to how many Pascals:
A
101325
B
10325
C
106075
D
10523
Bahawalpur, 2019
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Q 19:Mendeleev's Periodic Table was based upon the:
A
Electronic Configuration
B
Atomic Number
C
Atomic Mass
D
Completion of Subshell
Bahawalpur, 2019
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Q 20:Long form of periodic Table is constructed on the basis of:
A
Mass Number
B
Mendeleev's Postulate
C
Attomic numkber
D
Atomic Mass
Bahawalpur, 2019
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Total MCQs: 1548Page 2 of 155
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