Question

An ideal gas can't be liquefied because :

(A) its critical temperature is always above $0^{\circ} C$.

(B) its molecules are relatively smaller in size.

(C) it solidifies before becoming a liquid.

(D) forces operative between its molecules are zero.

Answer 1

An ideal gas can't be liquefied because forces operative between it's molecules are zero. So, The correct option of this question is (D).