$A$ solution whose $pH$ value is less than $7$ will be

The concentration of hydrogen ions in a given solution is $6 \times 10^{-4} \ M$. The $pH$ of the solution is:

When the $pH$ of a solution is $2$,the hydrogen ion concentration in moles per litre is

The $pH$ of a solution is $5.0$. To this solution,sufficient acid is added to decrease the $pH$ to $2.0$. The increase in hydrogen ion concentration is $...$ times.

If the $pH$ of water is less than ......,the water pipes undergo corrosion.

If the $pH$ of a solution is $2$,find the $[H^{+}]$ of the solution.