The chemical nature of hydrogen preoxide is :-

Question:

The chemical nature of hydrogen preoxide is :-

  1. Oxidising and reducing agent in acidic medium, but not in basic medium.

  2. Oxidising and reducing agent in both acidic and basic medium

  3. Reducing agent in basic medium, but not in acidic medium

  4. Oxidising agent in acidic medium, but not in basic medium.


Correct Option: 2,

Solution:

$\mathrm{H}_{2} \mathrm{O}_{2}$ act as oxidising agent and reducing agent in acidic medium as well as basic medium.

$\mathrm{H}_{2} \mathrm{O}_{2}$ Act as oxidant :-

$\mathrm{H}_{2} \mathrm{O}_{2}+2 \mathrm{H}^{\oplus}+2 \mathrm{e}^{\Theta} \rightarrow 2 \mathrm{H}_{2} \mathrm{O}$ (In acidic medium)

$\mathrm{H}_{2} \mathrm{O}+2 \mathrm{e}^{\ominus} \rightarrow 2 \mathrm{OH}^{\ominus}($ In basic medium $)$

$\mathrm{H}_{2} \mathrm{O}_{2}$ Act as reductant :-

$\mathrm{H}_{2} \mathrm{O}_{2} \rightarrow 2 \mathrm{H}^{+}+\mathrm{O}_{2}+2 \mathrm{e}^{\Theta}$ (In acidic medium)

$\mathrm{H}_{2} \mathrm{O}_{2}+2 \mathrm{OH}^{\Theta} \rightarrow 2 \mathrm{H}_{2} \mathrm{O}+\mathrm{O}_{2}+2 \mathrm{e}^{\ominus}($ In basic medium $)$

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