What is the $pH$ value of a basic aqueous solution?

State the number of water molecules present in crystals of washing soda and Plaster of Paris. What are these water molecules called?

How is an aqueous solution with $pH = 2$ compared to an aqueous solution with $pH = 4$?

Common salt, besides being used in the kitchen, can also be used as the raw material for making:
$(i)$ Washing soda
$(ii)$ Bleaching powder
$(iii)$ Baking soda
$(iv)$ Slaked lime

What are strong and weak acids? In the following list of acids,separate strong acids from weak acids: Hydrochloric acid,citric acid,acetic acid,nitric acid,formic acid,sulphuric acid.

When hydrogen chloride gas is dissolved in water,what happens?