Chemistry Past Paper Questions

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Q 321:Which one of the following ions does not cause hardness in water:
A
Ca2+
B
Mg2+
C
SO42-
D
Na+
Sahiwal, 2019
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Q 322:Which one of the following is an electron-deficient molecule?
A
BF3
B
N2
C
O2
D
NH3
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Q 323:Which one of the following is the lightest metal?
A
calcium
B
Magnesium
C
Lithium
D
sodium
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Q 324:Which one of the following shells consists of three subshells?
A
Shell K
B
Shell M
C
Shell O
D
Shell L
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Q 325:Which one of the following solutions contain more water?
A
2 M
B
1 M
C
0.5 M
D
0.25 M
Sahiwal, 2019
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Q 326:Which one of the following solutions contains more water?
A
2 M
B
1 M
C
0.5 M
D
0.25 M
Sahiwal, 2019
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Q 327:Which one of the following solutions is a liquid in solid?
A
sugar in water
B
butter
C
bronze
D
fog
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Q 328:Which one of the following does not affect the boiling point?
A
external pressure
B
intermolecular forces
C
initial temperature
D
nature of liquid
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Q 329:Which one of the following gas diffuses fastest?
A
Hydrogen
B
Helium
C
fluorine
D
chlorine
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Q 330:Which one of the following halogen has the lowest electronegativity?
A
Fluorine
B
Chlorine
C
Bromine
D
Iodine
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Total MCQs: 1548Page 33 of 155
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