Reason
The reactants are most strongly adsorbed on group 7 - 9 elements.
Assertion
For hydrogenation reactions, the catalytic activity increases from Group 5 to Group 11 metals with maximum activity shown by Group 7 - 9 elements.
For hydrogenation reactions, the catalytic activity increases from Group 5 to Group 11 metals with maximum activity shown by Group 7 - 9 elements.
A
Both assertion and reason are true and the reason is not the correct explanation for the assertion.
B
Both assertion and reason are true and the reason is the correct explanation for the assertion.
C
Both assertion and reason are false.
D
Assertion is true, but reason is false.
Correct option is D. Assertion is true, but reason is false.
For hydrogenation reactions, the catalytic activity increases from a group $$5$$ to group $$11$$ metals with maximum activity shown by group $$7-9$$ elements.The general trend for the activity for hydrogenation increases from left to right.
In Hydrogenation reaction, catalytic activity depends on variable oxidation states as well as atomic size.
Hence, the correct answer is option $$A$$.