One moles each of four ideal gases are kept as follows.& I. 5L of...

$∵$ For ideals gas

$pV = nRT$

or $T = \dfrac{pV}{nR}$

$∵ n = 1 =$ constant

$R = 0. 083 =$ constant

$∴ T ∝ PV$

Thus,

The gas that shows highest product of $p \times V$, has highest temperature.

for
(A) $p \times V = 2 \times 5 = 10atmL$

(B) $p \times V = 2 \times 2. 5 = 5atmL$

(C) $p \times V = 2 \times 1. 25 = 2. 5atmL$

(D) $p \times V = 2. 5 \times 2. 5 = 6. 25atmL$

Hence gas $( A )$ show highest temperature.