Question

$Zn$ does not show variable valency because of

• A. complete ' $d$ ' subshell
• B. inert pair effect
• C. $4s$ -subshell
• D. $5$ unpaired electrons.

Answer 1

Answer: (A)

$Zn$ does not show variable valency because of completely filled ${}^{\prime }{d}^{\prime }$ subshell.