Which of the following statements ${Na}_{2} O_{2}$ is not correct?

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It is a derivative of $H_{2} O_{2}$

It is the superoxide of sodium

It is diamagnetic in nature

${Na}_{2} O_{2}$ oxidizes ${Cr}^{3 +}$ to ${CrO}_{4}^{2 -}$ an acid medium.

answer is C.

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Detailed Solution

${Na}_{2} O_{2}$ is sodium peroxide. It has the peroxide ion $O_{2}^{2 -}$ , which may be written as $- O - O^{-}$ , making it a derivative of hydrogen peroxide. ${Na}_{2} O_{2}$ .

It is diamagnetic because there are no unpaired electrons in it.

As a result, ${Na}_{2} O_{2}$ option C is incorrect.

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