Question

Find the oxidation number of V in $R{b}_{4}Na\left[H{V}_{10}{O}_{28}\right]$.

• A. 5
• B. 2
• C. -5
• D. none of these

Answer 1

The correct option is A 5

Let oxidation state of $V$ is $x$ in $R{b}_{4}Na\left[H{V}_{10}{O}_{23}\right]$

$H\left(1\right)+1+1+10x-2\left(28\right)=0$

$6+10x-56=0$

$10x=50$

$x=+5$