In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices. a) Assertion and reason both are correct statements and reason is correct explanation for assertion.
b) Assertion and reason both are correct statements but reason is not correct explanation for assertion.
c) Assertion is correct statement but reason is wrong statement.
d) Assertion is wrong statement but reason is correct statement.

(i) Assertion: Physical adsorption of molecules on the surface requires activation energy. Reason: Because the bonds of adsorbed molecules are broken.
(ii) Assertion: The catalytic converter in the car’s exhaust system converts polluting exhaust gases into nontoxic gases. Reason: Catalytic converter contains a mixture of transition metals and their oxides embedded in the inner support.
(iii)Assertion: If a finely divided mixture of clay and charcoal is shaken with water and benzene, the clay will remain in water layer and charcoal will concentrate at the interface between the two liquids. Reason: In the adsorption of acetic acid from aqueous solution by charcoal it is assumed that a multi molecular layer of adsorbed substance is formed.
(iv)Assertion: Adsorption is a surface phenomenon. Reason: The intermolecular forces at the surface of the adsorbent is unequal in different directions.