Identify the correct statement.

Options

A. At critical point repulsive force dominates
B. At Boyle's temperature compressoblity factor will always be one.
C. Attractive forces will dominate in a gas showing negative deviation
D. If a gas is showing negative deviation then its compressiblity will be less than expected.

Answer

C

Explanation

(1) At critical point, `z = (3)/(8)`, attraction force dominates
(2) z is not always 1 at Boyle's temperature
(3) `z lt 1` attraction force dominates
(4) compressibility will be more than expected