$A$ mixture containing two liquids visibly separated,is placed in a separating funnel. Answer the following:
$(i)$ What type of liquids form the mixture?
$(ii)$ Which of the liquids will form the lower layer?
$(iii)$ What is the principle behind this method of separation?

Classify the following as sol,solution,or suspension:
$(i)$ Milk of magnesia
$(ii)$ Coloured gemstones
$(iii)$ Aerated drinks
$(iv)$ Emulsion paint

$(a)$ What separation technique will you apply for the separation of the following?
$(i)$ Ammonium chloride from sodium chloride.
$(ii)$ Different pigments from the extract of flower petals.
$(b)$ What is crystallisation? List two ways in which the crystallisation technique is better than the simple evaporation technique.

$(a)$ Give any one point of difference between true solution,colloidal solution,and suspension.
$(b)$ $20 \, g$ of sodium chloride is dissolved in $100 \, mL$ of water. How will you test whether the given solution is saturated or unsaturated at the given temperature?
$(c)$ Suggest any one method by which we can increase the solubility of saturated solutions.

Which of the following is an aqueous solution?

Colloids are quite stable. Name the process by which you can separate the components of a colloidal solution.