Which one of the following substances will be a mixed salt?

The $pH$ of the solution obtained on neutralization of $40 \ mL \ 0.1 \ M \ NaOH$ with $40 \ mL \ 0.1 \ M \ CH_3COOH$ is

Assertion $(A)$: The aqueous solution of $CH_3COONa$ is alkaline in nature.
Reason $(R)$: Acetate ion undergoes anionic hydrolysis.
The correct answer is

Which of the following salts on dissolution in water gives $pH$ less than $7$ at $298 \ K$?

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

At $25^{\circ} C$,the ionization constant for anilinium hydroxide is $5.00 \times 10^{-10}$. The hydrolysis constant of anilinium chloride is