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

Sidak took $50\, mL$ of water in two beakers at room temperature and added sodium chloride to one beaker while sugar to the other,until no more solute could be dissolved. Then she heated the contents of the beakers and added more solutes in them.
$(a)$ Will the amount of salt and sugar that can be dissolved in water at a given temperature be the same?
$(b)$ What would you expect to happen if she cools the contents of the beakers? Justify your answer.

State the separation technique you would apply for the separation of the following:
$(a)$ Sodium chloride from its solution in water
$(b)$ Tea leaves from tea
$(c)$ Iron pins from sand
$(d)$ Different pigments from an extract of leaves
$(e)$ Butter from curd
$(f)$ Fine mud particles suspended in water.

$(a)$ Compare metals and non-metals based on their physical properties. (any four points)
$(b)$ What are metalloids? Give two examples.
$(c)$ Identify metals from the following: Boron,sodium,mercury,carbon.

Which of the following are chemical changes?
$(i)$ Decaying of wood
$(ii)$ Burning of wood
$(iii)$ Sawing of wood
$(iv)$ Hammering of a nail into a piece of wood

Compare solution,suspension,and colloids in terms of:
$(a)$ stability
$(b)$ filterability
$(c)$ Tyndall effect