Chemistry Past Paper Questions

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Q 461:The end product of oxidation of acetylene is:
A
Oxalic acid
B
Glycol
C
Glyoxal
D
Ethane glycol
Faisalabad, 2018
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Q 462:The colour of I2 gas is:
A
Blue
B
Green
C
Purple
D
Red
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Q 463:The colour of iodine is:
A
Blue
B
Green
C
Purple
D
White
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Q 464:The conversion of H2S to Sulphur is: H2S + Cl2 ⟶ S + 2HCl
A
reduction
B
oxidation
C
redox
D
addition
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Q 465:The base of modern periodic table is:
A
atomic mass
B
Atomic Number
C
number of neutrons
D
atomic radius
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Q 466:The example of false solution or colloidal solution is:
A
Paints
B
Starch
C
Sugar in water
D
Salt in water
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Q 467:The example of solution of liquid in solid is:
A
butter
B
fog
C
mist
D
opals
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Q 468:The general electronic configuration of halogen family is:
A
ns2
B
ns2 np2
C
ns2 np4
D
ns2 np5
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Q 469:The molar mass of CO2 is:
A
34 amu
B
40 amu
C
44 amu
D
50 amu
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Q 470:The oxidation number of chlorine in KClO3 is: (K =+1, O = -2)
A
3
B
4
C
5
D
6
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Total MCQs: 1548Page 47 of 155
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