When $FeCl_3$ is dissolved in water,its solution exhibits which of the following characteristics?

If the dissociation constant of $HCN$ is $10^{-7}$,what are the values of $pH$,$h$ (degree of hydrolysis),and $[OH^-]$ for a $10^{-3} \ M$ solution of $KCN$,respectively?

An aqueous solution of ammonium carbonate is

The degree of hydrolysis of a salt of a weak acid and a weak base in its $0.1 \ M$ solution is found to be $50 \ \%$. If the molarity of the solution of the same salt is $0.5 \ M$,then the percentage degree of hydrolysis of the salt should be ......... $\%.$

Which of the following aqueous solutions will have a $pH$ less than $7.0$?

Which salt from the following forms an aqueous solution having $pH$ less than $7$?