For the following Assertion and Reason, the correct option is:

Assertion: For hydrogenation reactions, the catalytic activity increases from Group 5 to Group 11 metals with maximum activity shown by

Question

For the following Assertion and Reason, the correct option is:

Assertion: For hydrogenation reactions, the catalytic activity increases from Group 5 to Group 11 metals with maximum activity shown by Group 7–9 elements.

Reason: The reactants are most strongly adsorbed on Group 7–9 elements.

Canvas Classes · Accepted Answer

Assertion: Catalytic activity for hydrogenation increases from Group 5 → Group 11, with maximum at Group 7–9 (Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt). TRUE ✓

Reason: The reason given is that reactants are most strongly adsorbed on Group 7–9 elements. This is FALSE ✗

Correct explanation: The optimum catalytic activity at Group 7–9 is because:
- If adsorption is too weak (Group 11): reactants don't bind well
- If adsorption is too strong (Group 5–6): products cannot desorb
- Group 7–9 shows intermed

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