Question

Why zinc does not exhibit variable oxidation states?

• A. Completely filled \(4s\) subshell
• B. Completely filled \(3d\) subshell
• C. Incomplete \(3d\) subshell
• D. Incomplete \(4s\) subshell

Hint:

Zinc has a stable $3d^{10}$ configuration.

Answer 1

The Correct Option is B

Step 1: Compare with other 3d metals
Variable states in transition metals come from using both $4s$ and partly filled $3d$ electrons. Zinc has no partly filled $3d$ level, so it cannot do this. Option (B).

Final Answer:
Option (B). \[ \boxed{\text{(B)}} \]