Question

As the oxidation number of a transition metal in transition metal oxide increases, the melting point

• A. Increases
• B. Decreases
• C. Remains the same
• D. Cannot be predicted

Answer 1

The correct option is B Decreases

As the oxidation number​ of a transition metal in transition metal oxide increases​, the ionic character decreases.
$\text{Oxidation number}\propto \frac{1}{\text{Ionic character}}$

$\text{Ionic character}\propto \text{Melting Point}$

As the oxidation number of a transition metal in transition metal oxide increases, the melting point decreases.