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ChemistryNEET 2019Types of redox reactions

Redox Reactions

Which of the following reactions are disproportionation reactions?

(a) 2Cu+→Cu2++Cu02\mathrm{Cu^+ \to Cu^{2+} + Cu^0}

(b) 3MnO42−+4H+→2MnO4−+MnO2+2H2O3\mathrm{MnO_4^{2-} + 4H^+ \to 2MnO_4^- + MnO_2 + 2H_2O}

(c) 2KMnO4→K2MnO4+MnO2+O22\mathrm{KMnO_4 \to K_2MnO_4 + MnO_2 + O_2}

(d) 2MnO4−+3Mn2++2H2O→5MnO2+4H+2\mathrm{MnO_4^- + 3Mn^{2+} + 2H_2O \to 5MnO_2 + 4H^+}

Select the correct option:

  1. A.(a) and (b) only✓
  2. B.(a), (b) and (c)
  3. C.(a), (c) and (d)
  4. D.(a) and (d) only

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