In which of the following reactions H2O2 acts as a reducing agent? (a) H2O2 + 2H+ + 2e- arrow 2H2O (d) H2O2 - 2e- arrow O2 + 2H+ (c) H2O2 + 2e- arrow 2OH- (d) H2O2 + 2OH- - 2e- arrow O2 + 2H2O

Question

In which of the following reactions H2O2 acts as a reducing agent? (a) H2O2 + 2H+ + 2e- arrow 2H2O (d) H2O2 - 2e- arrow O2 + 2H+ (c) H2O2 + 2e- arrow 2OH- (d) H2O2 + 2OH- - 2e- arrow O2 + 2H2O  (A) (a) and (b) (B) (c) and (d) (C) (a) and (c) (D) (b) and (d)

Tardigrade Admin · Accepted Answer

The reducing agent oxidises itself.

(a)

H_{2} O_{2}^{- 1} + 2 H^{+} + 2 e^{-} ⟶ 2 H_{2} O^{- 2}

(b)

H_{2} O_{2}^{- 1} - 2 e ⟶ O_{2} + 2 H^{+}

(c)

H_{2} O_{2}^{- 1} + 2 e ⟶ 2 O H^{- 2}

(d)

H_{2} O_{2}^{- 1} + 2 O H^{-} - 2 e ⟶ O_{2} + H_{2} O

Note: Powers of 'O' are oxidation number of 'O' in the compound.

Q. In which of the following reactions H2​O2​ acts as a reducing agent? (a) H2​O2​+2H++2e−→2H2​O (d) H2​O2​−2e−→O2​+2H+ (c) H2​O2​+2e−→2OH− (d) H2​O2​+2OH−−2e−→O2​+2H2​O

(a) and (b)

(c) and (d)

(a) and (c)

(b) and (d)

The reducing agent oxidises itself. (a) H2​O2−1​+2H++2e−⟶2H2​O−2 (b) H2​O2−1​−2e⟶O2​+2H+ (c) H2​O2−1​+2e⟶2OH−2 (d) H2​O2−1​+2OH−−2e⟶O2​+H2​O Note: Powers of 'O' are oxidation number of 'O' in the compound.

Q. In which of the following reactions $H_{2} O_{2}$ acts as a reducing agent?
(a) $H_{2} O_{2} + 2 H^{+} + 2 e^{-} \to 2 H_{2} O$
(d) $H_{2} O_{2} - 2 e^{-} \to O_{2} + 2 H^{+}$
(c) $H_{2} O_{2} + 2 e^{-} \to 2 O H^{-}$
(d) $H_{2} O_{2} + 2 O H^{-} - 2 e^{-} \to O_{2} + 2 H_{2} O$