Chemistry Past Paper Questions

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Q 821:Substitution reaction is the characteristic property of:
A
Alkanes
B
Alkenes
C
Alkynes
D
None of these
Bahawalpur, 2017
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Q 822:The oceans contain about how much of total world's water:
A
99%
B
97%
C
95%
D
91%
Bahawalpur, 2017
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Q 823:The reaction goes form left to right if:
A
Qc = Kc
B
Qc > Kc
C
Qc < Kc
D
Qc = 0
Bahawalpur, 2017
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Q 824:When CO2 is passed through the ammonical Brine the only salt that precipitates is:
A
NaHCO3
B
NH4HCO3
C
Na2CO3
D
(NH4)2CO3
Bahawalpur, 2017
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Q 825:When glucose and fructose combines they produce:
A
Starch
B
Cellulose
C
Sucrose
D
None of these
Bahawalpur, 2017
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Q 826:Which gas protect the Earth's surface from ultraviolet radiations:
A
CO2 gas
B
CO
C
N2
D
O3
Bahawalpur, 2017
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Q 827:Tyndall effect is shown by.
A
Sugar Solution
B
Paints
C
Jelly
D
Chalk Solution
Bahawalpur, 2017
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Q 828:The amount of energy given out when an electron is added to an atom is:
A
Lattice energy
B
Ionization Energy
C
Electronegativity
D
Electron Affinity
Bahawalpur, 2017
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Q 829:The isotope C-12 is present in abundance of:
A
96.9%
B
97.6%
C
99.7%
D
None of these
Bahawalpur, 2017
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Q 830:Spontaneous chemical reaction takes place in:
A
Electrolytic Cell
B
Galvanic Cell
C
Nelson's cell
D
Down's Cell
Bahawalpur, 2017
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Total MCQs: 1548Page 83 of 155
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