The most stable oxidation state for Mo and W are respectively

Options

A. `+6,+6`
B. `+6,+5`
C. `+3,+3`
D. `+3,+6`

Answer

A

Explanation

In +6 oxidation sttat eMo has `4d^(0), 5s^(0)` electronic configuration.
In +6 oxidation state W has `4d^(0), 5s^(0)` electronic configuration.
According Hund's rule these electronic configuration are most stable.
Hence +6 oxidation state is most stable in Mo and W.