Question

Which does not undergo comproportionation reaction?

• A. $H_{2}S+SO_{2} \rightarrow $
• B. $I^{-}\left(\right.aq\left.\right)+IO_{3}^{-}\left(\right.aq\left.\right)+H^{+}\left(\right.aq\left.\right) \rightarrow $
• C. $K_{2}MnO_{4}+H^{+}\left(\right.aq\left.\right) \rightarrow $
• D. $MnO_{4}^{-}+Mn^{2 +}\left(\right.aq\left.\right) \rightarrow $

Answer 1

Answer: (C)

$H_{2}S\uparrow+SO_{2}\uparrow\overset{C o m p r o p o r t i o n a t i o n}{ \rightarrow }S\downarrow+H_{2}O$

$I^{-}\left(\right.aq\left.\right)+IO_{3}^{-}\left(\right.aq\left.\right)+H^{+}\left(\right.aq\left.\right)\overset{C o m p r o p o r t i o n a t i o n}{ \rightarrow }I_{2}+H_{2}O$

$K_{2}MnO_{4}+H^{+}\left(\right.aq\left.\right)\overset{D i s p r o p o r t i o n a t i o n}{ \rightarrow }KMnO_{4}+MnO_{2}\downarrow$

$MnO_{4}^{-}\left(\right.aq\left.\right)+Mn^{2 +}\left(\right.aq\left.\right)\overset{C o m p r o p o r t i o n a t i o n}{ \rightarrow }MnO_{2}\downarrow$