In a basic aqueous solution,what happens to the basicity of the solution as the concentration of $[OH^-]$ increases?

The aqueous solution having $pH \, 11$ is how many times more basic than an aqueous solution having $pH \, 8$?

Fill in the missing data in the following table:

Name of the salt	Formula	Base	Acid
$(i)$ Ammonium chloride	$NH_{4}Cl$	$NH_{4}OH$	-
$(ii)$ Copper sulphate	-	-	$H_{2}SO_{4}$
$(iii)$ Sodium chloride	$NaCl$	$NaOH$	-
$(iv)$ Magnesium nitrate	$Mg(NO_{3})_{2}$	-	$HNO_{3}$
$(v)$ Potassium sulphate	$K_{2}SO_{4}$	-	-
$(vi)$ Calcium nitrate	$Ca(NO_{3})_{2}$	$Ca(OH)_{2}$	-

$(i)$ Name the products obtained in the chlor-alkali process.
$(ii)$ Name the gases liberated at the anode and at the cathode,respectively.
$(iii)$ Name the solution which is used as raw material in this process.

Write the chemical formula of bleaching powder. How is bleaching powder prepared? For what purpose is it used in drinking water?

Identify the correct representation of the reaction occurring during the chlor-alkali process.