Which is not a method to prepare H_2O_2? | vedclass

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(B) The preparation of $H_2O_2$ involves several industrial and laboratory methods:$1$. The oxidation of $2-$ethyl Anthraquinol is the standard indust

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$H_2S_2O_7 \xrightarrow[Hydrolysis]{Complete}$

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(B) The preparation of $H_2O_2$ involves several industrial and laboratory methods:$1$. The oxidation of $2-$ethyl Anthraquinol is the standard industrial process for producing $H_2O_2$.$2$. The reaction of $BaO_2 \cdot 8H_2O$ with dilute acid ($H_2SO_4$ or $H_3PO_4$) is a standard laboratory method.$3$. The complete hydrolysis of peroxodisulphates like $K_2S_2O_8$ yields $H_2O_2$.$4$. $H_2S_2O_7$ (Oleum) on hydrolysis produces $H_2SO_4$,not $H_2O_2$. Therefore,option $B$ is not a method to prepare $H_2O_2$.

Which is not a method to prepare $H_2O_2$?

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