Question

Transition elements act as catalyst because

• A. their melting points are high
• B. their ionization potential values are high
• C. they have high density
• D. they show variable oxidation state
• E. they have high electronegativity

Hint:

Transition elements can act as catalysts due to their ability to change oxidation states, enabling electron transfer in reactions.

Answer 1

The Correct Option is D

Transition elements have the ability to change oxidation states during reactions, which makes them effective catalysts. This variability in oxidation states facilitates their participation in many chemical reactions.