Question

$4Cl{O}_{3\left(aq\right)}^{-}\to 3Cl{O}_{4\left(aq\right)}^{-}+C{l}_{\left(aq\right)}^{-}$ is an example of.

• A. Oxidation reaction
• B. Reduction reaction
• C. Decomposition reaction
• D. Disproportionation reaction

Answer 1

Answer: (D)

Disproportionation reaction

$4Cl{O}_{3\left(aq\right)}^{-}\to 3Cl{O}_{4\left(aq\right)}^{-}+C{l}_{\left(aq\right)}^{-}$ is an example of disproportionation reaction.
Disproportionation reaction is a redox reaction, a molecule is transformed into two dissimilar products. The species is simultaneously oxidized and reduced.
The oxidation number of chlorine increases from +5 (in $Cl{O}_3^{-}$) to +7 ( in $Cl{O}_4^{-}$ ). Thus, chlorine is oxidised.
The oxidation number of chlorine decreases from +5 (in $Cl{O}_3^{-}$) to -1 ( in $Cl$ ). Thus, chlorine is reduced.