A gas described by van der Waals equation .

Options

A. behaves similar to an ideal gas in the limit of large molar volumes
B. behaves similar to an ideal gas in the limit of large pressures
C. is characterised by van der Waals' coefficients that are dependent directly on identity of gas but are independent of temperature
D. has the pressure that is lower than the pressure exerted by the same behaving ideally.

Answer

A, C, D

Explanation

(a) van der Waals equation is :
`(p+(a)/(V^(2)))(V-b)=RT` for 1 mole
When V is very large, `V-b~~V` and
`p+(a)/(V^(2))~~p` so that `pV=RT`.i.e. behaves similar to ideal gas
(c ) van der Waals coefficients (a) and (b) are characteristic of a gas and are independent of temperature.
(d) Due to inward pull acting on a molecule striking the wall, the pressure decreases. .