Which one of the following is an example of disproportionation reaction?

Question

Which one of the following is an example of disproportionation reaction? (A) 3 MnO 42-+4 H + arrow 2 MnO 4-+ MnO 2+2 H 2 O (B) MnO 42-+4 H ++4 e - arrow MnO 2+2 H 2 O (C) 10 I -+2 MnO 4-+16 H + arrow 2 Mn 2++8 H 2 O +5 I 2 (D) 8 MnO 4-+3 S 2 O 32-+ H 2 O arrow 8 MnO 2+6 SO 42-+2 OH -

Tardigrade Admin · Accepted Answer

Correct answer is (a) 3 MnO 42-+4 H + arrow 2 MnO 4-+ MnO 2+2 H 2 O

Q. Which one of the following is an example of disproportionation reaction?

$3 M n O_{4}^{2 -} + 4 H^{+} \to 2 M n O_{4}^{-} + M n O_{2} + 2 H_{2} O$

$M n O_{4}^{2 -} + 4 H^{+} + 4 e^{-} \to M n O_{2} + 2 H_{2} O$

$10 I^{-} + 2 M n O_{4}^{-} + 16 H^{+} \to 2 M n^{2 +} + 8 H_{2} O + 5 I_{2}$

$8 M n O_{4}^{-} + 3 S_{2} O_{3}^{2 -} + H_{2} O \to 8 M n O_{2} + 6 S O_{4}^{2 -} + 2 O H^{-}$

Correct answer is (a) $3 M n O_{4}^{2 -} + 4 H^{+} \to 2 M n O_{4}^{-} + M n O_{2} + 2 H_{2} O$

Q. Which one of the following is an example of disproportionation reaction?

3MnO42−​+4H+→2MnO4−​+MnO2​+2H2​O

MnO42−​+4H++4e−→MnO2​+2H2​O

10I−+2MnO4−​+16H+→2Mn2++8H2​O+5I2​

8MnO4−​+3S2​O32−​+H2​O→8MnO2​+6SO42−​+2OH−

Correct answer is (a) 3MnO42−​+4H+→2MnO4−​+MnO2​+2H2​O

$3 M n O_{4}^{2 -} + 4 H^{+} \to 2 M n O_{4}^{-} + M n O_{2} + 2 H_{2} O$

$M n O_{4}^{2 -} + 4 H^{+} + 4 e^{-} \to M n O_{2} + 2 H_{2} O$

$10 I^{-} + 2 M n O_{4}^{-} + 16 H^{+} \to 2 M n^{2 +} + 8 H_{2} O + 5 I_{2}$

$8 M n O_{4}^{-} + 3 S_{2} O_{3}^{2 -} + H_{2} O \to 8 M n O_{2} + 6 S O_{4}^{2 -} + 2 O H^{-}$

Correct answer is (a) $3 M n O_{4}^{2 -} + 4 H^{+} \to 2 M n O_{4}^{-} + M n O_{2} + 2 H_{2} O$