Question

When a manganous salt is fused with a mixture of $KNO_{3}$ and solid NaOH the oxidation number of Mn changes from + 2 to

• A. +4
• B. +3
• C. +6
• D. +7

Answer 1

Answer: (C)

+6

Answer 2

: $\overset{+ 2}{M}nO + NaOH + KNO_{3} \rightarrow K_{2}\overset{+ 6}{M}nO_{4} + H_{2}O$