Question

Which can act as an oxidising as well as reducing agent?
(1) HC1O4
(2) HNO3
(3) H2O2
(4) H2SO4

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Answer 1

Answer:

3rd one is the correct answee

Answer 2

⟶ AnSwer :-

Which can act as an oxidising as well as reducing agent?

(1) HC1O$_4$

(2) HNO$_3$

☑ (3) H$_2$O$_2$

(4) H$_2$SO$_4$

option (3) H$_2$O$_2$ is right.

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Explaination :-

The species in which an element has oxidation number lying in between its minimum and maximum values can acts as oxidant and reductant both.

Oxidation state in species O$^{-1}$ in H$_2$O$_2$

Minimum oxidation state -2

Maximum oxidation state 0

Thus, hydrogen peroxide (H$_2$O$_2$) can act as an oxidising as well as a reducing agent.

H$_2$O$_2$ as an reducing agent :

$\sf Ag _{2} O+H_{2}O_{2} \longrightarrow 2Ag+H_{2}O + O_{2}$

H$_2$O$_2$ as an oxidising agent :

$\sf PbS+4H_{2}O_{2} \longrightarrow PbSO_{4} +4H_{2} O$