Question

An example of a disproportionation reaction is

• A. $2 MnO _{4}^{-}+10 I ^{-}+16 H ^{+} \longrightarrow 2 Mn ^{2+}+5 I _{2}+8 H _{2} O$
• B. $2 NaBr + Cl _{2} \longrightarrow 2 NaCl + Br _{2}$
• C. $2 KMnO _{4} \longrightarrow K _{2} MnO _{4}+ MnO _{2}+ O _{2}$
• D. $2 CuBr \longrightarrow CuBr _{2}+ Cu$

Answer 1

Answer: (D)

In disproportionation reactions, same element undergoes oxidation as well as reduction.
Among the given reaction, reaction (d) is a disproportionation reaction.

Here, $CuBr$ get oxidised to $CuBr _{2}$ and also it get reduced to $Cu$.