At 25 C all of the following ionic compounds produce a basic

Solution

A:- Except D. NaHSO4 remaining all compounds produce a basic aqueous solution, bacause NaHSO4 is dissolved in water to form strong acid and strong base,

Balanced equation,

NaHSO4   +   H2O -------> NaOH + H2SO4

                                      strong base strong acid

The remaining compounds, when dissolved in water to form strong base and weak acid, so a basic aqueous solution is produced by these compounds.

Balanced chemical equations,

NaF    +     H2O   --------> HF +    NaOH

                                     weak acid      strong base

Na3PO4 + 3 H2O --------> H3PO4   +   3 NaOH

                                     weak acid      strong base

NaNO2   + H2O   -----------> HNO2 +   NaOH

                                     weak acid      strong base