JEE Main 2022 · 26 Jul · Shift 1 · Chemistry Q68

ChemistrySingle correct+4 / -1Question 68 of 90

Which of the given reactions is not an example of disproportionation reaction ?

\mathrm{2H_2O_2\rightarrow2H_2O+O_2}

\mathrm{2NO_2+H_2O\rightarrow HNO_3+HNO_2}

\mathrm{MnO_4^-+4H^++3e^-\rightarrow MnO_2+2H_2O}

\mathrm{3MnO_4^{2-}+4H^+\rightarrow2MnO_4^-+MnO_2+2H_2O}

Answer and worked solution

Official answer: C

Reduction half-reaction of $\mathrm{MnO_4^-}$ alone is not a disproportionation.

(C)

Topics:Oxidation number

JEE Main 2022 · 26 Jul · Shift 1, Chemistry question 68