Assertion(A): Physical adsorption of milecules on the surface requires activation energy.
Reason(R): Because the bonds of adsorbed molecules are broken.

Assertion : Physical adsorption of molecules on the surface requires activation energy. Reason : Heat of adsorption is –ve.

Assertion : Physical adsorption on the surface of sadsorbent equires appreciable activation energy Reason : Because bonds of the adsorbate molecules are to break.

Assertion: Physical absorption of molecular takes place on surface only. Reason: In this process, the bonds of the absorbed molecules are not broken.

Assertion: Physisorption of molecules occures on surface only. Reason: in this process, the bonds of the adsorbed molecules are broken.

Assertion: Physisorption of molecules occures on surface only. Reason: in this process, the bonds of the adsorbed molecules are broken.

In physical adsorption, gas molecules are bound on the solid surface by