NCERT Section

Why does dry $\mathrm{H}\mathrm{C}\mathrm{l}$ gas not change the colour of dry litmus paper?

While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid?

How is the concentration of hydronium ions $\left({\mathrm{H}}_3{\mathrm{O}}^{+}\right)$ affected when a solution of an acid is diluted?

How is the concentration of hydroxide ions ${\text{OH}}^{\text{-}}$ affected when excess base is dissolved in a solution of sodium hydroxide?

What effect does the concentration of ${\mathrm{H}}^{+}\left(\mathrm{aq}\right)$ ions have on the nature of the solution?

Compounds such as alcohol and glucose also contain hydrogen but are not categorised as acids. Describe an activity to prove it.

What is neutralisation reaction? Give two examples.

Give two important uses of washing soda and baking soda.