Question

Gases deviate from the ideal gas behaviour because their molecules

• A. Possess negligible volume
• B. Have forces of attraction between them
• C. Are polyatomic
• D. Are not attracted to one another

Answer 1

The correct option is B

Have forces of attraction between them

Because molecules of real gases have intermolecular forces of attraction so the effective impact on the wall of container is diminished. Pressure of real gas is reduced by $\frac{a}{v^2}$ factor hence behaviour of real gas deviate from ideal behaviour.