$Orange-(A)$ (Inorganic compound) $+ H^{+} + H_2O_2 \to Blue-(B)$. The oxidation state of the central atom in compound $(B)$ is:

On heating $KMnO_4$,one among the following is not formed:

Which of the following aqueous solutions absorbs nitric oxide in significant amounts?

Which of the following is incorrect about $K_{2}Cr_{2}O_{7}$?

The addition of metals like $Cr$,$Mn$,$W$ and $Ni$ to ordinary steel makes it

Given below are two statements:
Statement $I$: Fusion of $MnO_2$ with $KOH$ and an oxidising agent gives dark green $K_2MnO_4$.
Statement $II$: Manganate ion on electrolytic oxidation in alkaline medium gives permanganate ion.
In the light of the above statements,choose the correct answer from the options given below.