Transition metals:

Options

A. exhibit only diamagnetism
B. undergo inert pair effect
C. do not form alloys
D. show variable oxidation states.

Answer

D

Explanation

(A) According to the definition of transition metals, they have partially filled `(n-1)` d orbitals excepts copper and Zinc thus mostly show paramagnetism.
(B) It is property of heavier p-block elements.
(C ) Transition metals from a large number of alloys. The transition metals are quite similar in size and , therefore , the atoms of one metal can substitute the atom of other metal can substitute the atoms of other metal in its crystal lattice. Thus , on cooling a mixture , solution of two or more transition metals, solid alloys are formed.
(D ) Show variable oxidation states as `(n-1)` d and ns orbitals have nearly the same energy and , thus ns as well as (n-1) d orbital can be lost giving variable oxidation state.