Which of the following equations depicts the reducing nature of H2O2 ?

# Which of the following equations depicts the reducing nature of ${\mathrm{H}}_{2}{\mathrm{O}}_{2}$ ?

1. A

$2\mathrm{Fe}\left(\mathrm{CN}{\right)}_{6}^{4-}+2{\mathrm{H}}^{+}+{\mathrm{H}}_{2}{\mathrm{O}}_{2}\to 2\mathrm{Fe}\left(\mathrm{CN}{\right)}_{6}^{3-}+2{\mathrm{H}}_{2}\mathrm{O}$

2. B

${\mathrm{O}}_{3}+{\mathrm{H}}_{2}{\mathrm{O}}_{2}\to 2{\mathrm{O}}_{2}+{\mathrm{H}}_{2}\mathrm{O}$

3. C

${\mathrm{Mn}}^{2+}+{\mathrm{H}}_{2}{\mathrm{O}}_{2}\to {\mathrm{Mn}}^{4+}+2{\mathrm{OH}}^{-}$

4. D

$\mathrm{PbS}+4{\mathrm{H}}_{2}{\mathrm{O}}_{2}\to {\mathrm{PbSO}}_{4}+4{\mathrm{H}}_{2}\mathrm{O}$

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### Solution:

In the reducing nature of ${\mathrm{H}}_{2}{\mathrm{O}}_{2}$ , the oxidation number of O atom is changed from -1 to 0.

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