Hydrogen peroxide can be preapared bythe 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) is

Hydrogen peroxide can be preapared bythe action of dil. H_(2)SO_(4) or

1.	Hydrogen peroxide can be preapared bythe 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) is
Answer» `CO_(2) lt H_(2)O_(2) lt H_(2)O` `H_(2)OLT H_(2)O_(2) lt CO_(2)` `H_(2)O lt H_(2)O_(2) GT CO_(2)` `H_(2)O_(2) gt CO_(2) gt H_(2)O` Solution :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