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KEAM 2010 Physics and Chemistry Paper
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Question : 57
Total: 119
Mean free path of a gas molecule is
inversely proportional to number of molecules per unit volume
inversely proportional to diameter of the molecule
directly proportional to the square root of the absolute temperature
directly proportional to the molecular mass
independent of temperature
Validate
Solution:
Mean free path
λ
=
1
√
2
π
n
d
2
where,
n
=
number of molecules/unit volume
d
=
diameter of the molecule.
Hence, mean free path of a gas molecule is inversely proportional to number of molecules per unit volume.
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