The values of van der Waals constant ‘a’ for the gases $${O_2},{N_2},N{H_3}$$ and $$C{H_4}$$ are 1.360, 1.390, 4.170 and 2.253 $${L^2}\,atm\,mo{l^{ - 2}}$$ respectively. The gas which can most easily be liquified is:
A.
$${O_2}$$
B.
$${N_2}$$
C.
$$N{H_3}$$
D.
$$C{H_4}$$
Answer :
$$N{H_3}$$
Solution :
$$'a’$$ is directly related to forces of attraction. Hence greater the value of $$'a’,$$ more easily the gas is liquified.
Releted MCQ Question on Physical Chemistry >> States of Matter Solid, Liquid and Gas
Releted Question 1
Equal weights of methane and oxygen are mixed in an empty container at $${25^ \circ }C.$$ The fraction of the total pressure exerted by oxygen is