Name the technique used to separate:
$(i)$ Butter from curd,
$(ii)$ Salt from sea-water,
$(iii)$ Camphor from salt.

Which separation techniques will you apply for the separation of the following?
$(a)$ Sodium chloride from its solution in water.
$(b)$ Ammonium chloride from a mixture containing sodium chloride and ammonium chloride.
$(c)$ Small pieces of metal in the engine oil of a car.
$(d)$ Different pigments from an extract of flower petals.
$(e)$ Butter from curd.

How can we obtain pure copper sulphate from an impure sample?

How will you separate a mixture of naphthalene powder and common salt? Draw a neat and labelled diagram to show the process.

Give an example each of a mixture that shows the following characteristics:
$(i)$ $A$ mixture of two coloured components.
$(ii)$ $A$ mixture of two volatile components with a boiling point difference of less than $25\ K$.
$(iii)$ $A$ mixture of a volatile and a non-volatile solid component.

Enumerate any two differences between simple distillation and fractional distillation.