Question

Which is/are correct for real gases ?

• A. $\underset{P\to 0}{Lt}\left(P{V}_m\right)$= constant at constant high temperature
• B. $\underset{V_m\to 0}{Lt}\left(P{V}_m\right)$= constant at constant low temperature
• C. $\underset{P\to 0}{Lt}\left(\frac{P{V}_m}{RT}\right)=1$ at high temperature
• D. $\underset{V\to 0}{Lt}\left(\frac{P{V}_m}{RT}\right)=R$

Answer 1

Answer: (A), (C)

The correct options are
A $\underset{P\to 0}{Lt}\left(P{V}_m\right)$= constant at constant high temperature
C $\underset{P\to 0}{Lt}\left(\frac{P{V}_m}{RT}\right)=1$ at high temperature

Low $P$ and high temperature gas bahaves as an ideal gas.
$\therefore PV=\text{constant and}\frac{P{V}_m}{RT}=1$