Sodium carbonate is a basic salt because it is a salt of :

The physiological reactions occurring in the human body take place in the range of $......\,pH.$

Who proposed the acid-base theory of ionization?

Give suitable reasons for the following statements: An aqueous solution of sodium chloride is neutral,but an aqueous solution of sodium is basic.

According to the Arrhenius theory,an acid is a hydrogen-containing compound that produces $..........$ in its aqueous solution.

Answer the following:
$(i)$ Why is Plaster of Paris written as $CaSO_{4} \cdot 1/2 H_{2}O$? How is it possible to have half a water molecule attached to $CaSO_{4}$?
$(ii)$ Why is sodium hydrogen carbonate an essential ingredient in antacids?
$(iii)$ When electricity is passed through an aqueous solution of sodium chloride,three products are obtained. Why is the process called chlor-alkali?