Which of the following will not undergo hydrolysis in water?

The hydrolysis constant $(K_h)$ for a salt of a weak acid and a weak base is given by:

Which one of the following salts on being dissolved in water gives $pH > 7$ at $25^{\circ} C$?

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

Which of the following salts turns red litmus blue in its aqueous solution?

$A$ weak acid $HX$ $(K_a = 10^{-5})$ on reaction with $NaOH$ gives $NaX$. For $0.1 \ M$ aqueous solution of $NaX$,the $\%$ hydrolysis is $....... \ \%$.