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

Question

Which of the given reactions is not an example of disproportionation reaction? (A) 2 H 2 O 2 arrow 2 H 2 O + O 2 (B) 2 NO 2+ H 2 O arrow HNO 3+ HNO 2 (C) MnO 4-+4 H ++3 e - arrow MnO 2+2 H 2 O (D) 3 MnO 42-+4 H + arrow 2 MnO 4-+ MnO 2+2 H 2 O

Tardigrade Admin · Accepted Answer

Correct answer is (c) MnO 4-+4 H ++3 e - arrow MnO 2+2 H 2 O

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

$2 H_{2} O_{2} \to 2 H_{2} O + O_{2}$

$2 N O_{2} + H_{2} O \to H N O_{3} + H N O_{2}$

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

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

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

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

2H2​O2​→2H2​O+O2​

2NO2​+H2​O→HNO3​+HNO2​

MnO4−​+4H++3e−→MnO2​+2H2​O

3MnO42−​+4H+→2MnO4−​+MnO2​+2H2​O

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

$2 H_{2} O_{2} \to 2 H_{2} O + O_{2}$

$2 N O_{2} + H_{2} O \to H N O_{3} + H N O_{2}$

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

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

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