Question

Assertion (A): Transition metals and their complexes show catalytic activity.
Reason (R): The activation energy of a reaction is lowered by the catalyst.

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
• C. A is correct but (R) is incorrect
• D. A is incorrect but (R) is correct

Hint:

Catalytic property of transition metals is due to variable oxidation states and intermediate complex formation.

Answer 1

The Correct Option is B

Transition metals and their complexes show catalytic activity due to their variable oxidation states and ability to form intermediates.
Catalysts generally work by lowering activation energy, but the reason for catalytic activity in transition metals is not just due to lowering of activation energy. It is due to their ability to adsorb reactants and form activated complexes.
Hence, both statements are correct, but (R) is not the correct explanation of (A).