Which of the following statements are not correct ?

Options

A. at low pressure the molecules of an ideal gas move with slower speed as compared to the gas at high pressure.
B. The value of gas constant R is `8.314.JK^(-1) Mol^(-1)`
C. The value of Boltzmann constant k is `1.38xx10^(-23)JK^(-1) "molecule^(-1)`
D. The van.der waals constant a is a measure of forces of attraction between gaseous molecules of a gas.

Answer

A, B, C