The behaviour of temporary gases like carbon dioxide approaches that of permanent gases such as nitr — States of Matter and Gaseous State Chemistry Question

💡 Solution & Explanation

"Permanent gases" possess very low critical temperatures relative to room temperature, preventing them from being easily liquefied. A "temporary gas" like $\text{CO}_2$ behaves similarly to a permanent gas when it is heated far above its own critical temperature, transitioning into a supercritical state that defies liquefaction by pressure. Therefore, correct answer is B.