Question

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?

Gas	$T_{c}/k$
$N_{2}$	$126.0$
$CO_{2}$	$304.10$
$NH_{3}$	$405.5$
$O_{2}$	$154.3$

• 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 1

Answer: (C)

$NH_{3}$will liquefy first and $N_{2}$at last.

Answer 2

: Higher the critical temperature, Faster is the liquefaction of the gas.