Define alkalies and give an example.

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

In $H_{3}O^{+}$,there is a coordinate covalent bond between $......$ and $......$.

What is the molarity of a solution prepared by dissolving $8 \ g$ of $NaOH$ in water to make a total volume of $100 \ mL$ (in $M$)?

Write balanced chemical equations for the following:
$(i)$ Carbon dioxide gas is passed through lime water.
$(ii)$ $NaOH$ solution is heated with zinc granules.

Identify $A, B$ and $C$ in the following reactions and write the chemical name of $A, B$ and $C$.
$(i)$ $HNO_{3} + NaOH \rightarrow \underline{A} + H_{2}O$
$(ii)$ $\underline{B} + Ca(OH)_{2} \rightarrow CaSO_{4} + 2H_{2}O$
$(iii)$ $HCl + \underline{C} \rightarrow KCl + H_{2}O$