Chemistry Past Paper Questions

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Q 261:The colour of Iodine is:
A
Red
B
Purple
C
White
D
Pink
Rawalpindi, 2019
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Q 262:The first organic compound was prepared by:
A
Dalton
B
Berzelluis
C
Lavoisier
D
Wohler
Rawalpindi, 2019
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Q 263:The fraction of residual oil is:
A
Petroleum ether
B
Petroleum gas
C
Lubricants
D
Diesel oil
Rawalpindi, 2019
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Q 264:The general formula of alkenes is:
A
CnH2n+2
B
CnH2n-2
C
CnH2n+1
D
CnH2n
Rawalpindi, 2019
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Q 265:The unit of molar concentration are:
A
mol dm-3
B
mol cm2
C
mol dm3
D
mol m2
Rawalpindi, 2019
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Q 266:What is pOH of 0.02M Ca(OH)2:
A
1.397
B
1.698
C
12.31
D
12.61
Rawalpindi, 2019
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Q 267:Triple covalent bond involves how many electrons?
A
8
B
6
C
4
D
3
Rawalpindi, 2019
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Q 268:The isotope C-12 is present in abundance of:
A
96.9%
B
97.6%
C
98.9%
D
99.7%
Rawalpindi, 2019
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Q 269:The number of elements in third period of the long form of periodic table is:
A
2
B
8
C
18
D
32
Rawalpindi, 2019
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Q 270:The corrosion of iron is called:
A
Alloying
B
Electroplating
C
Galvanizing
D
Rusting
Rawalpindi, 2019
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Total MCQs: 1548Page 27 of 155
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