van der Waals Equation - past JEE questions

1. In the van der Waals equation of state for a non-ideal gas the term that accounts for intermolecular forces is

a. (V-b)
b. RT
c. (P + a/V²)
d. (RT) ‾ ¹
(1988)

Answer ( c )

A is a measure of the forces of attraction between molecules

2. Indicate whether the following statement is true or false

In the van der Waals equation

[p + n²a/V²] (V – nb) = nRT

the constant ‘a’ reflects the actual volume of the gas molecules.

(1993)

Answer: False

The constant b reflects the actual volume of one mole of gaseous molecules.

Chemistry Basic Concepts MCQ

1. The oxidation number of carbon in CH2O is

a. -2
b. +2
c. 0
d. +4
(JEE 1982)

Ans: ( c )