Assertion : In physical adsorption , enthalpy of adsorption in very low.
Reason : In physical adsorption , enthalpy of adsorption is very low.
Reason : In physical adsorption , attraction between gas molecules and solid surface is due to weak van der Walls forces.
A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. if both assertion and reason are false