Question

Variable oxidation state and degenerated orbital shows:

• A. s-block element
• B. p-block element
• C. d-block element
• D. all of these

Answer 1

Answer: (C)

d-block element

Answer 2

The general electronic configuration of $d$ - block elements is $(n-1) d^{1-10}, n s^{1-2}$. They show variable oxidation state because $d$ - electrons also take part in bond formation. They have degenerated orbitals. $s$ and $p$-block elements in general do not show variable oxidation states.