Chemistry Past Paper Questions

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Q 541:The relationship between v, f and λ of a wave is:
A
vf -= λ
B
fλ = v
C
vλ = f
D
v = λ/f
Gujranwala, 2018
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Q 542:The turn ratios of a transformer is 10. It means:
A
Is = 10 Ip
B
Ns = Np / 10
C
Ns = 10 Np
D
Vs = Np / 10
Gujranwala, 2018
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Q 543:What does the term e-mail stand for?
A
Emergency Mail
B
Electronic Mail
C
Extra Mail
D
External Mail
Gujranwala, 2018
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Q 544:When NaHCO3 is heated it forms:
A
CO2
B
Ca(OH)2
C
CaCO3
D
CaO
Gujranwala, 2018
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Q 545:Which gas protects the earth's surface from ultraviolet radiation?
A
CO2
B
CO
C
N2
D
O3
Gujranwala, 2018
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Q 546:The vapour pressure increases by the
A
increase of pressure
B
increase of temperature
C
increase of molecular polarity
D
increase of inter molecular forces
Gujranwala, 2018
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Q 547:the vapour pressure of a liquid increases with the:
A
Increase of Pressure
B
Increase of temperature
C
Increase of Inter molecular forces
D
Increase of polarity of molecules
Gujranwala, 2018
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Q 548:The number of electrons can be accommodated in "K" shell:
A
2
B
8
C
18
D
32
Gujranwala, 2018
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Q 549:The number of periods in modern periodic table is:
A
7
B
8
C
9
D
10
Gujranwala, 2018
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Q 550:The oxidation number of nitrogen in HNO3 is:
A
+3
B
+5
C
+6
D
-3
Gujranwala, 2018
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Total MCQs: 1548Page 55 of 155
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