Question

The number of electrons involved in the reduction of permanganate to manganese dioxide in acidic medium is _______

Answer 1

Answer: 3

$\stackrel{+7}{\mathrm{Mn}}{O}_4^{-}+4H^{+}+3e^{-}\to \stackrel{+4}{\mathrm{Mn}}{O}_2+2H_{2}O$