1.

An aqueous solution of nitrous acid (HNO_(2)) , free of salts , can be obtained from the reaction

Answer»

`Ba(NO_(2))_(2)+H_(2)SO_(4) to `
`NaNO_(2) + H_(2)SO_(4) OVERSET("Cold ") to `
`NH_(4)NO_(2) + H_(2)SO_(4) to `
`KNO_(3) +HNO_(3) to `

Solution :Nitrous ACID can be obtained by the REACTION of sulphuric acid with `Ba(NO_(2))_(2)`.


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