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AMU Engineering 2019 solved paper Solved Paper
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© examsnet.com
Question : 54
Total: 150
Which of the following statement is not true?
The pressure of a gas is due to collision of the gas molecules with the walls of the container
The molecular velocity of any gas is proportional to the square root of the absolute temperature
The rate of diffusion of a gas is directly proportional to the density of the gas at constant pressure
Kinetic energy of an ideal gas is directly proportional to the absolute temperature
Validate
Solution:
It is wrong because the rate of diffusion of a gas is inversely proportional to the density of the gas at constant pressure.
r
∝
1
√
d
According to Graham's law the rate of diffusion is inversely proportional to square root of molecular weight and density.
r
∝
1
√
d
and
r
∝
1
√
M
If one gas has rate of diffusion
r
1
other gas has rate of diffusion
r
2
, density of gases are
d
1
and
d
2
, then
r
1
r
2
=
√
d
2
d
1
or
r
1
r
2
=
√
M
2
M
1
© examsnet.com
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