Aqueous solutions of `HNO_(3), KOH, CH_(3)COOH`,and `CH_(3)COONa` of identical concentrations are provided. The pair (s) of solution which form a buffer upon mixing is// are

Aqueous solution of HNO_(3), KOH, CH_(3)COOH and CH_(3)COONa of identical concentration are provided. The pair (s) of solutions which form a buffer upon mixing is (are)

Aqueous solution of HNO_(3),CH_(3),CH_(3)COOH , and CH_(3)COOK of identical concentrations are given. The pair (s) of the solution which may form a buffer upon mixing is (are):

Aqueous solution of HNO_(3),CH_(3),CH_(3)COOH , and CH_(3)COOK of identical concentrations are given. The pair (s) of the solution which may form a buffer upon mixing is (are):

Aqueous solutions of HNO3 and CH3COONa of identical concentrations are provided. is This pair of solutions form a buffer upon mixing

Aqueous solutions of KOH and CH_3COOH of identical concentrations are provided. is This pair of solutions form a buffer upon mixing

An aqueous solution of CH_3 COONa is