Which among the following salts is $NOT$ hydrolysed in water?

Calculate $[H^{+}]$ at the equivalence point during the titration of $25 \ mL$ of $0.1 \ M$ weak acid $HA$ $(K_a = 10^{-5})$ with $0.05 \ M \ NaOH$ solution.

The aqueous solution of ammonium chloride is

Consider the following aqueous solutions:
$(1)$ $FeCl_3$ is basic
$(2)$ $NH_4Cl$ is acidic
$(3)$ $NaCN$ is acidic
$(4)$ $Na_2CO_3$ is basic
Which of the following statements is $NOT$ correct?

$A$ white salt is readily soluble in water and gives a colourless solution with a $pH$ of about $9$. The salt would be

An aqueous solution of $CuSO_4$ will be: