Which of the following reaction shows the reduction reaction of H 2 O 2 -A- PbS -4 H 2 O 2 - PbSO 4-4 H 2 OB- 2 I -2 H - H 2 O 2 - I 2-2 H 2 OC- H 2 O 2- O 3 - H 2 O -2 O 2D- K 2 Cr 2 O 7- H 2 SO 4-4 H 2 O 2 - K 2 SO 4-2 CrO 5-5 H 2 O

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Oxides of Sulphur

Which of the ...

Question

Which of the following reaction shows the reduction reaction of $H_{2}$ $O_{2}$ ?

PbS + 4H2O2 → PbSO4 +4H2O

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2I^- + 2H^+ + H2O2 → I2 + 2H2O

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H2O2 + O3 → H2O + 2O2

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K2Cr2O7 +H2SO4 +4H2O2→K2SO4 + 2CrO5 + 5H2O

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P b S + H_{2} O_{2} \to P b S O_{4} + H_{2} O

P b S + H_{2} O_{2} \to P b S O_{4} + H_{2} O

Given :

Oxidation :

$H_{2} O_{2} \to O_{2} + 2 H^{\oplus} + 2 e^{-}$

$E^{⊖} = - 0.69 V$ ;

$2 F^{⊖} \to F_{2} + 2 e^{-}$

$E^{⊖} = - 2.87 V$ ;

Reduction :

$H_{2} O_{2} + 2 H^{\oplus} + 2 e^{-} \to 2 H_{2} O$

$E^{⊖} = - 1.77 V$ ;

$2 I^{⊖} \to I_{2} + 2 e^{-}$ $E^{⊖} = - 0.54 V$ ;

Which of the following statements is/are correct ?

H_{2} O_{2}

H_{2} O_{2} + O_{3} \to H_{2} O + 2 O_{2}

H_{2} O_{2}

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