$pH$ of $10^{-3} \ M$ $NaCl$ solution at $25 \ ^oC$ is

$20\,mL$ of $0.1\,M\,NH_{4}OH$ is mixed with $40\,mL$ of $0.05\,M\,HCl$. The $pH$ of the mixture is nearest to. (Given: $K_{b}(NH_{4}OH) = 1 \times 10^{-5}, \log 2 = 0.30, \log 3 = 0.48, \log 5 = 0.69, \log 7 = 0.84, \log 11 = 1.04$) (in $.2$)

Aqueous solution of ferric chloride is

Which of the following is an acidic salt?

In which of the following salts,only cationic hydrolysis is involved?

The aqueous solution of $AlCl_3$ is: