Which of the following statements is incorrec | vedclass

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(A) $1$. $H_2O_2$ acts as a bleaching agent due to the release of nascent oxygen $(H_2O_2 \rightarrow H_2O + [O])$. This bleaching action is temporary

Vedclass · Accepted Answer

$H_2O_2$ shows permanent bleaching action

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(A) $1$. $H_2O_2$ acts as a bleaching agent due to the release of nascent oxygen $(H_2O_2 ightarrow H_2O + [O])$. This bleaching action is temporary because the bleached material can be re-oxidized by atmospheric oxygen. Thus,the statement that it shows permanent bleaching action is incorrect.$2$. The normality of $H_2O_2$ is calculated as $	ext{Normality} = \frac{	ext{Volume strength}}{5.6}$. For $20 \ vol$ $H_2O_2$,the normality is $\frac{20}{5.6} \ N$,which is correct.$3$. $H_2O_2$ is used to restore the white colour of old oil paintings by oxidizing black lead sulphide $(PbS)$ to white lead sulphate $(PbSO_4)$: $PbS + 4H_2O_2 ightarrow PbSO_4 + 4H_2O$. This is correct.$4$. $H_2O_2$ is indeed manufactured by the electrolysis of $50\%$ $H_2SO_4$ to form peroxodisulphuric acid,which is then hydrolyzed. This is correct.

Which of the following statements is incorrect?

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