What is the $pH$ of a neutral solution at the normal temperature of the human body $(37^{\circ}C)$?

If the $pH$ of an aqueous solution is $6$,then the concentration of $OH^{-}$ in the solution will be ...............

There are two different solutions, $A$ and $B$. The $pH$ of solution $A$ is $4$. Find the $pH$ of solution $B$ having $[H^+]$ concentration three times that of solution $A$.

If $[H_3O^+]$ of a solution is $1 \times 10^{-4} \text{ M}$, what is the value of $pOH$ at $298 \text{ K}$?

The $pH$ of a solution is $4$. The hydroxide ion concentration of the solution would be:

The $pH$ of a soft drink is $3.82$. Its hydrogen ion concentration will be