Question

Which of the following reaction depicts with reducing action of H2O2 ?

• A. C6H6 + H2O2$\longrightarrow$C6H5OH + H2O
• B. 2I– + 2H+ + H2O2$\longrightarrow$I2 + 2H2O
• C. 2MnO4– + 6H+ + 5H2O2$\longrightarrow$2Mn2+ + 5O2 + 8H2O
• D. PbS + 4H2O2$\longrightarrow$PbSO4 + 4H2O

Answer 1

Answer: (C)

2MnO4– + 6H+ + 5H2O2$\longrightarrow$2Mn2+ + 5O2 + 8H2O

Answer 2

Oxidation number of Mn in MnO–4 is + 7 and oxidation number in Mn2+ is + 2.

The oxidation number decreases from + 7 to + 2, hence MnO–4. is reduced.