The table indicates the value of vander Waal's constant a in L^(2)atm mol 2. The gas which can most easily be liquefied is ?

The table indicates the value of vander Waal's constant a in L^(2)at

1.	The table indicates the value of vander Waal's constant a in L^(2)atm mol 2. The gas which can most easily be liquefied is ?
Answer» `O_2` `N_2` `NH_3` `CH_4` ANSWER :C