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

$1 \ L$ of $0.02 \ M$ aqueous $HCl$ is mixed with $1 \ L$ of $0.01 \ M$ aqueous $H_2SO_4$ solution. Assuming complete dissociation and no change in the volume upon mixing,the $pH$ of the resultant solution is $(\log_{10} 2 = 0.3)$.

$40 \ mg$ of pure sodium hydroxide is dissolved in $10 \ L$ of distilled water. The $p^H$ of the solution is ..........

$A$ solution with $pH = 5.0$ is diluted $100$ times. Calculate the $pH$ of the diluted solution.

The $pH$ of the aqueous solution containing $0.49 \ g$ of $H_2SO_4$ in one litre is

Which will have maximum $pH$?