Which one of the following salts gives an aqueous solution which is weakly basic?

When a salt of a weak acid and a weak base is dissolved in water at $25\,^{\circ}C$,the $pH$ of the resulting solution will always

When solid potassium cyanide $(KCN)$ is added to water,then:

Which of the following salts undergoes anionic hydrolysis?

The aqueous solution of which of the following will have the highest $pH$?

The degree of hydrolysis of a $0.1 \ M$ solution of $ArNH_3^+ Cl^-$ is $0.01$. Find the degree of hydrolysis in a $0.4 \ M$ solution of $ArNH_3^+ Cl^-$.