What is the $pH$ value of $\frac{N}{1000} \ KOH$ solution?

$pH$ of a $10 \ M$ solution of $HCl$ is

If $0.4 \ g$ of $NaOH$ is present in $1 \ L$ of solution,then its $pH$ will be:

At $25^{\circ} C$, $pH$ of a $10^{-8} \ M$ aqueous $KOH$ solution will be

Following four solutions are prepared by mixing different volumes of $NaOH$ and $HCl$ of different concentrations. The $pH$ of which one of them will be equal to $1$?

If $10^{-6} \ M \ HCl$ is diluted $100$ times,its $pH$ will be: