Question

When a manganous salt is fused with a mixture of $KN{O}_3$ and solid $NaOH$ the oxidation number of $Mn$ changes from $+2$ to

• A. +4
• B. +3
• C. +6
• D. +7

Answer 1

Answer: (C)

$\stackrel{(+2)}{M{n}^{+2}}+N{O}_3^{-}+O{H}^{-}⟶\stackrel{(+6)}{Mn{O}_4^{-2}}+H_{2}O$