Hydrogen peroxide can be preapared by the action of dil. `H_(2)SO_(4)` or `H_(3)PO_(4)` on barium peroxide or by bubbling peroxide . On an industrial scale, it can be prepared by hydrolysis of peroxodisulphuric acid obtained by electrolysis of 50% `H_(2)SO_(4)` or an equimolar mixture of `H_(2)SO_(4)` and ammonium sulphate . The strength of `H_(2)O_(2)` solution can be expressed in a number of ways namely normality , molarity , percentage strength and volume strength . Volume strength refers to the volume of `O_(2)` produced at N.T.P. by decomposition of 1 mL of `H_(2)O_(2)` solution. `H_(2)O_(2)` acts as an oxidising as well as reducing agent both in acidic and basic media. The correct increasing order of the acidity of `CO_(2), H_(2)O and H_(2)O_(2)` isA. `CO_(2) lt H_(2)O_(2) lt H_(2)O`B. `H_(2)Olt H_(2)O_(2) lt CO_(2)`C. `H_(2)O lt H_(2)O_(2) gt CO_(2)`D. `H_(2)O_(2) gt CO_(2) gt H_(2)O`

Hydrogen peroxide can be preapared by the action of dil. `H_(2)SO_(4)`

1.	Hydrogen peroxide can be preapared by the action of dil. `H_(2)SO_(4)` or `H_(3)PO_(4)` on barium peroxide or by bubbling peroxide . On an industrial scale, it can be prepared by hydrolysis of peroxodisulphuric acid obtained by electrolysis of 50% `H_(2)SO_(4)` or an equimolar mixture of `H_(2)SO_(4)` and ammonium sulphate . The strength of `H_(2)O_(2)` solution can be expressed in a number of ways namely normality , molarity , percentage strength and volume strength . Volume strength refers to the volume of `O_(2)` produced at N.T.P. by decomposition of 1 mL of `H_(2)O_(2)` solution. `H_(2)O_(2)` acts as an oxidising as well as reducing agent both in acidic and basic media. The correct increasing order of the acidity of `CO_(2), H_(2)O and H_(2)O_(2)` isA. `CO_(2) lt H_(2)O_(2) lt H_(2)O`B. `H_(2)Olt H_(2)O_(2) lt CO_(2)`C. `H_(2)O lt H_(2)O_(2) gt CO_(2)`D. `H_(2)O_(2) gt CO_(2) gt H_(2)O`
Answer» Correct Answer - b A strong acid displaces a weaker acid from its salts `BaO_(2) + underset("Stronger acid")ubrace (H_(2)O+CO_(2))to BaCO_(2) + underset("Weaker acid")(H_(2)O_(2))` i.e. `CO_(2)` is a stronger acid from `H_(2)O_(2)` `therefore ` option (b) is correct

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