Verified Solution • 2025–26 Session moderate

QNEET-2019-Ch-772: NEET 2019 Chemistry - Class 11 NEET-2019-Ch-772 Solution: Which of the following reactions are disproportionation…

Which of the following reactions are disproportionation reaction? (a) 2Cu+→Cu2++Cu02Cu^+ \rightarrow Cu^{2+} + Cu^0 (b) 3MnO42−+4H+→2MnO4−+MnO2+2H2O3MnO_4^{2-} + 4H^+ \rightarrow 2MnO_4^- + MnO_2 + 2H_2O (c) 2KMnO4→K2MnO4+MnO2+O22KMnO_4 \rightarrow K_2MnO_4 + MnO_2 + O_2 (d) 2MnO4−+3Mn2++2H2O→5MnO2+4H+2MnO_4^- + 3Mn^{2+} + 2H_2O \rightarrow 5MnO_2 + 4H^+ Select the correct option from the following: (a) (c) and (d) (a) and (b) only (a) and (d) only (a) (b) and (c)

Multiple Choice Options

  • A (a), (c) and (d)
  • B (a) and (b) only
  • C (a) and (d) only
  • D (a), (b) and (c)

Step-by-Step Verified Solution

In a disproportionation reaction, same substance undergoes oxidation (increase in oxidation number) and reduction (decrease in oxidation number forming two different products.

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