For real gases, van der Waals' equation is written as
`(P+(an^(2))/(V^(2))) (V-nb)= nRT`
where `a` and `b` are van der Waals' constants.
Two sets of gases are:
`(I) O_(2), CO_(2), H_(2)` and `He(II) CH_(4), O_(2)` and `O_(2) and H_(2)`
The gases given in set `I` in increasing order of `b` and gases given in set `II` in decreasing order of `a` are arranged below. Select the correct order from the following:

Options

A. `He lt H_2 lt CO_2 lt O_2 (II) CH_4 gt H_2 gt O_2`
B. `(I)O_2 lt He lt H_2 lt CO_2 (II) H_2 gt O_2 gt CH_4`
C. `(I) He lt H_e lt O_2 lt CO_2 (II) CH_4 gt O_2 gt H_2`
D. `(I) H_2 lt O_2 lt He lt CO_2 (II) O_2 gt CH_4 gt H_2`

Answer

C

Explanation