The $pH$ of millimolar $HCl$ is

The $pH$ of a solution obtained by mixing $50 \ mL$ of $0.4 \ N \ HCl$ and $50 \ mL$ of $0.2 \ N \ NaOH$ is

At $25 \, ^\circ C$,the $OH^{-}$ ion concentration in $10^{-5} \, M \, HCl(aq.)$ is......

Which of the following statements is not correct?

$pH$ values of $HCl$ and $NaOH$ solutions each of strength $\frac{N}{100}$ will be respectively:

Equal volumes of two solutions $A$ and $B$ of a strong acid having $pH=6.0$ and $pH=4.0$ respectively are mixed together to form a new solution. The $pH$ of the new solution will be in the range