Question

Critical temperature of gases A, B, C and D are ${25}^{\circ }C,{10}^{\circ }C,-{80}^{\circ }Cand{15}^{\circ }C$ respectively. Which one of the above gases is most easy to liquify ?

• A. B
• B. C
• C. D
• D. A

Answer 1

The correct option is D A

We know that the critical temperature signifies the force of attraction between the molecules. The higher the critical temperature higher is the intermolecular force of attraction and easier is the liquification of the gas. Among the given gases, critical temperature is in order
A>D>B>C.
Hence, A will get liquified easily.