The vander waal's constant "a" for gases P,Q,R and S are 4.17 , 359 . 6.71 & 3.8 atm `L^(2) " mol"^(-2)` . Therefore , the ascending order of their ease of liquefaction is :-

Options

A. `R lt P lt S lt Q`
B. `Q lt S lt R lt P`
C. `Q lt S lt P lt R`
D. `R lt P lt Q lt S`

Answer

C

Explanation

Easily liquefiable gases have greater intermolecular forces which is represented by high value of .a.. The greater the value of .a. more will be liquefiable. so, the order is `Q lt S lt P lt R`