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

• A. Both assertion and reason are false.
• B. The assertion is true, but the reason is false.
• C. Both assertion and reason are true, but the reason is not the correct explanation of assertion
• D. Both assertion and reason are true and the reason is the correct explanation of assertion

Answer 1

The correct option is B The assertion is true, but the reason is false.

Generally catalytic property depends upon the variable oxidation state and size of the elements. So group 7-9 elements of the periodic table shows maximum catalytic activity. Due to smaller in size, group 11,12 have lower catalytic activity than others.