Transition metals behave as good catalyst because

CONCEPT:

Transition Metals as Catalysts

• Transition metals are elements that have partially filled d-orbitals. They are found in the d-block of the periodic table and exhibit unique properties that make them effective catalysts.
• One of the key properties of transition metals that contributes to their catalytic activity is their ability to exist in multiple oxidation states.

EXPLANATION:

• Transition metals can change their oxidation states during chemical reactions, which allows them to facilitate the breaking and forming of bonds in reactants.
• This property enables them to provide an alternative pathway for the reaction with a lower activation energy, thereby increasing the reaction rate.
• Additionally, transition metals can form complex compounds with reactants, stabilizing transition states and intermediates during the reaction.

Therefore, transition metals behave as good catalysts because of their variable oxidation states.