Question

9.
For real gases van der Waals equation is written as
an?
12
p+ m2 (V - nb) = n RT, where 'a' and 'b' are van
der Waals constants. Two sets of gases are :
() 0,,co,, H, and He
(II) CH, O, and H,
The gases given in set-I in increasing order of 'b' and
gases given in set-Il in decreasing order of 'a', are
arranged below. Select the correct order from the
following:
[AIPMT (Mains)-2012]
(1) (1) He <H> <CO, < 0, (II) CH, > H, > 0,
(2) (1)0, < He <H, <CO, (11) H, > 0,>CH,
(3) (1) H< < He < 0,<CO, (II) CH, > 0,>H,
(4) (1) H, <0 < He < CO, (II) O, > CH > H,
2​

Answer 1

Explanation:

(1) (1) He <H> <CO, < 0, (II) CH, > H, > 0,

(2) (1)0, < He <H, <CO, (11) H, > 0,>CH,

(3) (1) H< < He < 0,<CO, (II) CH, > 0,>H,

(4) (1) H, <0 < He < CO, (II) O, > CH > H,

2 is answer