Question

Metals are usually used as catalysts belong to

• A. s-block
• B. p-block
• C. d-block
• D. f-block

Hint:

Transition metals and their compounds are widely used as catalysts due to their ability to change oxidation states and provide a suitable surface for reactions.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Transition metals (d-block elements) are known for their exceptional catalytic properties.

Step 2: Detailed Explanation:
d-block elements (transition metals) possess vacant d-orbitals and variable oxidation states. These properties allow them to adsorb reactants, form intermediates, and lower the activation energy of reactions, making them excellent catalysts. Examples include Fe (Haber process), Ni (hydrogenation), and Pt (catalytic converters). s-block and p-block elements are generally less effective as catalysts, and f-block elements (lanthanides/actinides) are used in specific catalytic processes but are not the most common.

Step 3: Final Answer:
Metals used as catalysts typically belong to the d-block, which corresponds to option (C).