Question

As the oxidation number of a transition metal in transition metal oxide increases, the acidic character

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

Answer 1

The correct option is A Increases

As the oxidation number of a transition metal in transition metal oxide increases, the acidic character increases
$\text{Oxidation number}\propto \text{Acidic character}$

$M{n}_2{O}_7+H_{2}O\to 2HMn{O}_4$
$3Cr{O}_3+2H_{2}O\to H_{2}Cr{O}_4+H_{2}C{r}_2{O}_7$

$HMn{O}_4$ and $H_{2}C{r}_2{O}_7$ are strong acids.
Also,