What is meant by 'disproportionation'? Give two examples of disproportionation reactions in aqueous solution.
(N/A) disproportionation reaction is a special type of redox reaction in which a species in a particular oxidation state is simultaneously oxidized and reduced.
Examples in aqueous solution:
$(i)$ $3CrO_4^{3-} + 8H^{+} \to 2CrO_4^{2-} + Cr^{3+} + 4H_2O$
Here,$Cr(V)$ is oxidized to $Cr(VI)$ and reduced to $Cr(III)$.
$(ii)$ $3MnO_4^{2-} + 4H^{+} \to 2MnO_4^{-} + MnO_2 + 2H_2O$
Here,$Mn(VI)$ is oxidized to $Mn(VII)$ and reduced to $Mn(IV)$.
Examples in aqueous solution:
$(i)$ $3CrO_4^{3-} + 8H^{+} \to 2CrO_4^{2-} + Cr^{3+} + 4H_2O$
Here,$Cr(V)$ is oxidized to $Cr(VI)$ and reduced to $Cr(III)$.
$(ii)$ $3MnO_4^{2-} + 4H^{+} \to 2MnO_4^{-} + MnO_2 + 2H_2O$
Here,$Mn(VI)$ is oxidized to $Mn(VII)$ and reduced to $Mn(IV)$.
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Similar Questions
In the following reaction,identify the nature of the product formed by the complete hydrolysis of the underlined atom at $R.T.$:
$\underline{Cl}_2 + H_2O \longrightarrow HOCl + HCl$
$\underline{Cl}_2 + H_2O \longrightarrow HOCl + HCl$
Difficult
View SolutionWhich of the following reactions are disproportionation reactions?
$(a)$ $2 Cu^{+} \rightarrow Cu^{2+} + Cu^{0}$
$(b)$ $3 MnO_{4}^{2-} + 4 H^{+} \rightarrow 2 MnO_{4}^{-} + MnO_{2} + 2 H_{2}O$
$(c)$ $2 KMnO_{4} \xrightarrow{\Delta} K_{2}MnO_{4} + MnO_{2} + O_{2}$
$(d)$ $2 MnO_{4}^{-} + 3 Mn^{2+} + 2 H_{2}O \rightarrow 5 MnO_{2} + 4 H^{+}$
Select the correct option from the following:
$(a)$ $2 Cu^{+} \rightarrow Cu^{2+} + Cu^{0}$
$(b)$ $3 MnO_{4}^{2-} + 4 H^{+} \rightarrow 2 MnO_{4}^{-} + MnO_{2} + 2 H_{2}O$
$(c)$ $2 KMnO_{4} \xrightarrow{\Delta} K_{2}MnO_{4} + MnO_{2} + O_{2}$
$(d)$ $2 MnO_{4}^{-} + 3 Mn^{2+} + 2 H_{2}O \rightarrow 5 MnO_{2} + 4 H^{+}$
Select the correct option from the following:
MediumNEET 2019
View SolutionThe reaction of white phosphorus with aqueous $NaOH$ gives phosphine along with another phosphorus-containing compound. The reaction is known as:
Difficult
View Solution$PhCHO \xrightarrow{OH^{-}} PhCH_2OH + PhCOO^{-}$
This reaction is an example of -
This reaction is an example of -
Medium
View SolutionThe compound that cannot act both as an oxidising and reducing agent is:
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