Which of the following reactions are disproportionation reactions? (A) Cu + rightarrow Cu 2+ + Cu (B) 3 MnO 4 2- +4 H + rightarrow 2 MnO 4 - + MnO 2 +2 H 2 O (C) 2 KMnO 4 rightarrow 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 + Choose the correct answer from the options given below:

Chemistry · Redox Reactions

JEE Main 2024 — 1 February, Shift 1 — Question 60

Which of the following reactions are disproportionation reactions?

(A) $\mathrm{Cu}^{+} \rightarrow \mathrm{Cu}^{2+}+\mathrm{Cu}$

(B) $3 \mathrm{MnO}_{4}^{2-}+4 \mathrm{H}^{+} \rightarrow 2 \mathrm{MnO}_{4}^{-}+\mathrm{MnO}_{2}+2 \mathrm{H}_{2} \mathrm{O}$

(D) $2 \mathrm{MnO}_{4}^{-}+3 \mathrm{Mn}^{2+}+2 \mathrm{H}_{2} \mathrm{O} \rightarrow 5 \mathrm{MnO}_{2}+4 \mathrm{H}^{+}$

Choose the correct answer from the options given below:

When a particular oxidation state becomes less stable relative to other oxidation state, one lower, one higher, it is said to

undergo disproportionation.

$\mathrm{Cu}^{+} \rightarrow \mathrm{Cu}^{2+}+\mathrm{Cu}$

$3 \mathrm{MnO}_{4}^{2-}+4 \mathrm{H}^{+} \rightarrow 2 \mathrm{MnO}_{4}^{-}+\mathrm{MnO}_{2}+2 \mathrm{H}_{2} \mathrm{O}$

Answer key and solution verified before publishing.

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