Given below are the critical temperatures of a few gases . When the gases are started cooling , which gas will liquefy first and which will liquefy in the end ?

Options

A. `N_(2)` will liquefy first and `NH_(3)` at last .
B. `NH_(3)` will liquefy first and `CO_(2)` at last .
C. `NH_(3)` will liquefy first and `N_(2)` at last .
D. `CO_(2)` will liquefy first and `NH_(3)` at last .

Answer

C

Explanation

Higher the critical temperature, faster is the liquefaction of the gas. Hence, `NH_(3)` will liquefy first and `N_(2)` at last.