Question

The catalytic activity of transition metals and their compounds is mainly due to :
(a) their magnetic behaviour
(b) their unfilled d-orbitals
(c) their ability to adopt variable oxidation state
(d) their chemical reactivity

Answer 1

C IS CORRECT ANSWER..........

Answer 2

${\huge {\mathfrak {Answer :-}}}$

➡️ Option (C)

That's it..