JEE Main 2022 — Chemistry Physical Chemistry

2022mcqeasy

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

Official previous-year question

Held on 26 Jul 2022 · Verified 6 Jul 2026.

Options

A
$2{H}_{2}{O}_{2}\rightarrow 2{H}_{2}O+{O}_{2}$
B
$2{\mathrm{NO}}_{2}+{H}_{2}O\rightarrow {\mathrm{HNO}}_{3}+{\mathrm{HNO}}_{2}$
C
${\mathrm{MnO}}_{4}^{-}+4{H}^{+}+3{e}^{-}\rightarrow {\mathrm{MnO}}_{2}+2{H}_{2}O$
D
$3{\mathrm{MnO}}_{4}+2-4{H}^{+}\rightarrow 2{\mathrm{MnO}}_{4}+-{\mathrm{MnO}}_{2}+2{H}_{2}O$

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Solution

Disproportionation reaction, is a type of redox reaction involving simultaneous reduction and oxidation of atoms of the same element from one oxidation state (OS) to two different oxidation states.

$2\underset{-1}{{H}_{2}{O}_{2}}\longrightarrow 2\underset{-2}{{H}_{2}O}+\underset{0}{{O}_{2}^{}}$ : Disproportionation

$2{\mathrm{NO}}_{2}+{H}_{2}O\rightarrow {\mathrm{HNO}}_{3}+{\mathrm{HNO}}_{2}$ : Disproportionation

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

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

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JEE Main 2022 — Chemistry Physical Chemistry

2022mcqeasy

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

Official previous-year question

Held on 26 Jul 2022 · Verified 6 Jul 2026.

Options

A
$2{H}_{2}{O}_{2}\rightarrow 2{H}_{2}O+{O}_{2}$
B
$2{\mathrm{NO}}_{2}+{H}_{2}O\rightarrow {\mathrm{HNO}}_{3}+{\mathrm{HNO}}_{2}$
C
${\mathrm{MnO}}_{4}^{-}+4{H}^{+}+3{e}^{-}\rightarrow {\mathrm{MnO}}_{2}+2{H}_{2}O$
D
$3{\mathrm{MnO}}_{4}+2-4{H}^{+}\rightarrow 2{\mathrm{MnO}}_{4}+-{\mathrm{MnO}}_{2}+2{H}_{2}O$

Did you get this right?

Solution

Disproportionation reaction, is a type of redox reaction involving simultaneous reduction and oxidation of atoms of the same element from one oxidation state (OS) to two different oxidation states.

$2\underset{-1}{{H}_{2}{O}_{2}}\longrightarrow 2\underset{-2}{{H}_{2}O}+\underset{0}{{O}_{2}^{}}$ : Disproportionation

$2{\mathrm{NO}}_{2}+{H}_{2}O\rightarrow {\mathrm{HNO}}_{3}+{\mathrm{HNO}}_{2}$ : Disproportionation

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

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

JEE Main 2022 — Chemistry Physical Chemistry

Options

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JEE Main 2022 — Chemistry Physical Chemistry

Options

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Solution

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JEE Main Physical Chemistry in other years

More JEE Main Physical Chemistry questions

Other Chemistry topics for JEE Main

Organic Chemistry

Inorganic Chemistry

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