Question

(a) State the main points of difference between homogeneous and heterogeneous mixtures.

(b) Classify the following materials as homogeneous mixtures and heterogeneous mixtures :

Soda-water, Wood, Air, Soil, Vinegar, Alcohol and water mixture, Petrol and water mixture, Chalk and water mixture, Sugar and water mixture, Copper sulphate solution.

Answer 1

(a)

Homogenous Mixture	Heterogeneous Mixture
1) A homogeneous mixture is a substance that is uniform in composition.	1) A heterogeneous mixture is a mixture in which the composition is not uniform.
2) It has a single phase.	2) It has two or more phases.
3) Examples of the homogenous mixture are solutions such as sugar solution, and salt solution.	3) Examples of heterogeneous mixtures are sugar, sand solution, polluted air etc.

(b) Examples of homogeneous mixtures are soda water, air, vinegar, alcohol and water mixture, sugar and water mixture, copper sulphate solution.

Examples of the heterogeneous mixture are wood, petrol and water mixture, chalk and water mixture.