Question

Gas deviates from ideal gas nature because molecules:

• A. are colourless
• B. attract each other
• C. contain covalent bond
• D. show Brownian movement

Answer 1

The correct option is B attract each other

There are mainly 2 reasons for the deviation of gases from ideal behavior :
finite size of molecules,
attractive forces between the molecules.
The finite size of molecules accounts for the factor '$b$' in Vander Waals equation
and the attractive forces between the molecules accounts for the factor '$a$' in vander Waals equation.
So, B is the correct answer.