What is the nature of an aqueous solution of washing soda?

Write true or false for the following statement:
The universal indicator shows the same colour at different concentrations of hydrogen ions in a solution.

Which of the following is a strong acid?

What is the concentration of $[H_3O^+]$ in distilled water at $298 \; K$?

During the preparation of hydrogen chloride gas on a humid day,the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to

In which form do $H^{+}$ (hydrogen) ions exist in water?