Question

Oxidation numbers of Mn in its compounds $MnCl_{2},Mn(OH)_{3},MnO_{2}$and $KMnO_{4}$respectively are.

• A. +2,+4,+7,+3
• B. +2,+3,+4,+7
• C. +7,+3,+2,+4
• D. +7,+4,+3,+2

Answer 1

Answer: (B)

+2,+3,+4,+7

Answer 2

: $MnCl_{2} \rightarrow x + ( - 2) = 0 \Rightarrow x = + 2$

$MN(OH)_{3} \rightarrow x + ( - 3) = 0 \Rightarrow x = + 3$

$MnO_{2} \rightarrow x + ( - 4) = 0 \Rightarrow x = + 4$

$KMnO_{4} \rightarrow + 1 + x + ( - 8) = 0 \Rightarrow x = + 7$