Question

Arrange the following in the increasing order of oxidation state of $Mn.$
(i) $M{n}^{2+}$
(ii) $Mn{O}_2$
(iii) $KMn{O}_4$
(iv) $K_{2}Mn{O}_4$.

• A. (i) $>$ (ii) $>$ (iii) $>$ (iv)
• B. (i) $<$ (ii) $<$ (iv) $<$ (iii)
• C. (ii) $<$ (iii) $<$ (i) $<$ (iv)
• D. (iii) $<$ (i) $<$ (iv) $<$ (ii)

Answer 1

Answer: (B)

(i) $<$ (ii) $<$ (iv) $<$ (iii)

Oxidation state of given compounds is as follow:

$\underset{(+2)}{M{n}^{2+}}<\underset{(+4)}{Mn{O}_2}<\underset{(+6)}{K_{2}Mn{O}_4}<\underset{(+7)}{KMn{O}_4}$.