MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

The atomic number of zinc is 30. The electronic configuration of zinc is [Ar] 3d^ 10 4s^ 2 . Zinc loses two electrons from the 4s subshell to form Zn^ 2+ ion, which has a stable [Ar] 3d^ 10 configuration. Since the 3d subshell is completely filled and highly stable, it does not lose any further electrons. Therefore, zinc does not exhibit variable oxidation states due to its completely filled 3d subshell. Answer: Completely filled 3d subshell