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Gases X, Y, Z, P and Q have the van der ...

Gases X, Y, Z, P and Q have the van der Waal's constants 'a' and 'b' (in CGS units) as shown below:
`|{:(,X,Y,Z,P,Q),(a,6,6,20,0.05,30),(b,0.025,0.15,0.1,0.02,0.2):}|`
The gas with the highest critical temperature is:

A

P

B

Q

C

Y

D

X

Text Solution

Verified by Experts

The correct Answer is:
D
Critical temperature, `T_(c) = (8a)/(27 Rb)`
`:.` Greater is the value of `(a//b)`, more is the critical temperature of gas.
For gas `X, T_(c)` will be maximum
`T_(c) = (8a)/(27 Rb)`
`(a)/(b)` for `X = (6)/(0.025) = 240`, for all other gases, `((a)/(b))` is lesser
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