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Among the following cases, in which case...

Among the following cases, in which case mean free path increases 

A

With increasing altitude

B

with increasing temperature

C

When `O_2` is replaced by `CO_2` molecules

D

When density of gas increased

Text Solution

Verified by Experts

The correct Answer is:
A, B
`lambda uarr` with `T and lambda ` with `P darr`. i.e. increased in altitude `lambda darr as sigma uarr.`
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