The $pH$ of a $NaCl$ solution is:

$A$ solution of sodium borate has a $pH$ of approximately

The addition of solid sodium carbonate $(Na_2CO_3)$ to pure water causes:

Which of the following produce an alkaline solution when dissolved in water?
$(i)$ Borax
$(ii)$ Potash alum
$(iii)$ $Na_2CO_3$
$(iv)$ $NH_4NO_3$

What happens when solid $Na_2CO_3$ is dissolved in water?

The dissociation constant of a substituted benzoic acid at $25^{\circ}C$ is $1.0 \times 10^{-4}$. The $pH$ of a $0.01 \ M$ solution of its sodium salt is