Question

Which of the following are correct statements? 

(A) Vander Waal’s constant ‘a’ is a measure of attractive force 

(B) Vander Waal’s constant ‘b’ is also called covolume or excluded volume 

(C) ‘b’ is expressed in L mol^–1 

(D) ‘a’ is expressed in atm L² mol^–2

Answer 1

Correct Option  (A, B, C, D)  

Explanation:

 (a) a corrects the pressure term which is affected by attraction between molecules. 

(b) (V – nb) 

∴ b corrects the volume and excludes the volume occupied by molecules itself