Question

What should be the colour of the compound which has vanadium in +4 oxidation state?

• A. Blue
• B. Yellow
• C. Red
• D. Green

Answer 1

The correct option is A Blue

Electronic configuration of $V^{4+}is\left[Ar\right]3d^1$.
We know that, $d^{9}and{d}^1$ compounds have similar colour. So the colour of $V^{4+}$ is blue.