Who defined acid and base on the basis of chemical properties?

Why does dry $HCl$ gas not change the colour of the dry litmus paper?

What happens when a glass rod dipped in concentrated hydrochloric acid is brought near a container filled with ammonia gas?

Which of the following substances enters our body when a red ant bites us?

Write true or false for the following statement:
Mixing an acid or base with water results in an increase in the concentration of ions $(H_{3}O^{+} / OH^{-})$ per unit volume.

What type of substance is $NH_{3}$?