Define the following terms:
(i) True solution
(ii) Solute
(iii) Solvent      
(iv) Solubility.

5

(a)

Solubility of potassium nitrate at 313 K is 62 g. What mass of potassium nitrate would be needed to produce a saturated solution of KNO₃  in 50 g of water at 313 K what is the effect of change of temperature on the solubility of a salt?

5

(a)

(a) Name the techniques used for separation of those solutes that dissolve in the same solvent.
(b) give any two applications of this technique.

5

(a)

List the various types of homogeneous and heterogeneous mixtures with examples.

5

(a)

List in tabular from any three differences between true solution, colloidal solution and suspension.

5

(a)

(a)Compare true solution, suspension and colloidal in terms of:
(i) filterability 
(ii) stability
(b) List two factors which bring about a change in the state of matters say, gas to liquid.

5

(a)

Differentiate between physical and chemical changes.

5

(a)

A silver ornament of mass m gram is polished with gold equivalent to 1% of the mass of silver. Compute the ratio of the number of atoms of gold and silver in the ornament.

5

(a)