$A$ solution of $FeCl_3$ in water acts as acidic due to

$A$ salt $X$ is dissolved in water $(pH = 7)$,and the resulting solution becomes alkaline in nature. The salt is made of:

The $pH$ of the solution,when
$(i)$ sodium acetate is dissolved in water.
$(ii)$ ammonium chloride is dissolved in water.

Which of the following salt solutions turns red litmus blue?

The percentage degree of hydrolysis of a salt of weak acid $(HA)$ and weak base $(BOH)$ in its $0.1 \ M$ solution is found to be $10 \%$. If the molarity of the solution is $0.05 \ M$,the percentage hydrolysis of the salt should be ....... $\%$.

The $pH$ of an aqueous solution of alum is ....