The aqueous solution of $CuSO_4$ is

The aqueous solution of which of the following salts has the lowest $pH$?

The degree of hydrolysis of which salt is independent of the concentration of the salt solution?

The $pK_{a}$ of acetic acid and $pK_{b}$ of ammonium hydroxide are $4.76$ and $4.75$ respectively. Calculate the $pH$ of ammonium acetate solution.

Which among the following salt solutions in water is acidic in nature?

It is found that at $25\,\text{°C}$,$0.1\,M$ solutions of four sodium salts $NaA$,$NaB$,$NaC$,and $NaD$ have the $pH$ values $7$,$9$,$10$,and $11$ respectively. Which one of the corresponding acids is the strongest?