Question

$H_2O_2$ with $KMnO_4$ in acidic medium gives a manganese compound 'X' and in basic medium gives another manganese compound 'Y'. The oxidation states of manganese in X and Y respectively are:

• A. +2, +4
• B. +4, +2
• C. +3, +4
• D. +4, +3

Hint:

Remember: In acidic medium, $KMnO_4$ gives Mn$^{2+}$; in basic or neutral medium, it gives MnO$_2$.

Answer 1

The Correct Option is A

In acidic medium, $KMnO_4$ (Mn in +7 oxidation state) is reduced to Mn$^{2+}$ (oxidation state = +2).
In basic medium, $KMnO_4$ is reduced to MnO$_2$ where Mn has oxidation state +4.