Which one of the following characteristics of the transition metals is associated with their catalytic activity?

Options

A. Colour of hydrated ions.
B. Variable oxidation states.
C. High enthalpy of atomization.
D. paramagnetic behaviour.

Answer

B

Explanation

(A) Associated with d--d transition of electrons.
(B) The transition metals from the reaction intermediates due to the presence of vacant orbitals or their tendency to form variable oxidation states.
(C ) Associated with the number of unpaired electrons participating in metallic bondig
(D) As`mu=sqrt(n(n+2))`,So, it associated with number of unpaired electron.