Among the following compounds, the one that gets hydrolysed to form metallic hydroxide, hydrogen peroxide and oxygen is:

{N a}_{2} O

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{N a}_{2} O_{2}

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{L i}_{2} O

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{L i}_{2} O_{2}

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K O_{2}

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Solution

The correct option is E $K O_{2}$
Potassium superoxide, $K O_{2}$ , when reacts with water at low temperature, gives hydroxide, hydrogen peroxide, and oxygen.
$2 K O_{2} + 2 H_{2} O ⟶ 2 K O H + H_{2} O_{2} + O_{2}$
At higher temperatures, $H_{2} O_{2}$ decomposes.

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