Explain giving reasons: (iv) Transition metals and their many compounds act as good catalyst.
Explanation Transition metals can easily pass from one oxidation state to another. This provides a new path to reaction with lower activation energy. The surface of transition elements is a good adsorbent due to which increased concentration of reactant gets adsorbed onto their surfaces and speeds up the reaction. Final Answer Transition metals and their compounds act as good catalysts because their surfaces act as good adsorbents and they can easily pass from one oxidation state to another.
