an aqueous solution of HNO_2 (nitrous acid), free of salt can be obtai – InterviewSolution

1.	an aqueous solution of HNO_2 (nitrous acid), free of salt can be obtained from the reaction
Answer» `BA(NO_(2))_(2)+H_(2)SO_(4) to ` `NaNO_(2) +HNO_(4) overset("Cold")to` `NH_(4)NO_(2)+H_(2)SO_(4) to` `KNO_(3) +H_(2)SO_(4) to ` Answer :A

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