Question

The value of van der waal's constant 'a' for gases $O_2,N_2,N{H}_3$ and $C{H}_4$ are $x,y,z$ and $c$ respectively ,where $z>c>y>x$.The gas which can most easily be liquefied is ?

• A. $O_2$
• B. $N_2$
• C. $N{H}_3$
• D. $C{H}_4$

Answer 1

The correct option is C $N{H}_3$

The cander wall's constant ${}^{\prime }{a}^{\prime }$ gives correction for inter molecular forces. Larger the value of $a$, more will be the inter molecular forces, hence more easy it will be to liquefy the gas. Since $z$ has the highest value, $N{H}_3$ can be easily liquefied.