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For the following Assertion and Reason, ...

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 7-9elements.
Reason: The reáctants are most strongly adsorbed on group 7-9 elements.

A

Both assertion and reason are true and the reason is the correct explanation for the assertion.

B

Both assertion and reason are false. Both assertion and reason are true but

C

Both assertion and reason are true but the reason is not the correct explanation for the assertion

D

The assertion is true, but the reason is false

Text Solution

Verified by Experts

The correct Answer is:
B
Catalytic hydrogenation depends upon the extent of adsorption.
Group 7-9 elements exhibit maximum adsorption property he reactants must get adsorbed reasonably strongly on to the catalyst to become active. However, they must not get adsorbed so strongly that they are immobilized and other reactants are left with no space on the catalyst’s surface for adsorption.Hence, assertion is true but reason is false.
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