Q. Zn does not show variable valency because of
A) Complete $d$-subshell
B) Inert pair effect
C) $4s^{2}$-subshell
D) None of these
Explanation
(a)
The elements having incomplete $d$-orbital can show variable oxidation state (because the electrons move the two levels of $d$ itself)
$\therefore\$Zn has completely filled $d$-orbital.
$\therefore\$It does not show variable oxidation state. It always show +2 oxidation state.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.