Which one of the following reactions represents the oxidizing property of H2O2 ?

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2KMnO4 + 3H2SO4 + 5H2O2 → K2SO4 + 2MnSO4+8H2O + 5O2

2K3[Fe(CN)6]+ 2KOH + H2O2 → 2K4[Fe(CN)6] + 2H2O+O2

PbO2 +H2O2 → PbO+H2O+O2

2KI +H2SO4 +H2O2 → K2SO4 +I2+2H2O

answer is D.

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Detailed Solution

⇒In the above reaction H2O2 reduces the Mn+7 to Mn+2 there H2O2 acts as reducing agent.⇒ In the above reaction H2O2 acts as a reducing agent since it reducing agent Fe+3 [ferric] to Fe+2 [ferrous].⇒In the above reaction H2O2 acts as a reducing agent since it reducing agent Pb+4 to Pb+2⇒In the above reaction H2O2 acts as oxidising agent,since it oxidises the I-1 to I2

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