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, Alcholol and water mixture, Petrol and water mixture, Chalk and water mixture, Sugar and water mixture, Copper sulphate solution.

Answer 1

(a)

Homogeneous mixture	Heterogeneous mixture
1. A mixture in which different constituents are mixed uniformly.	1. A mixture in which different constituents are not mixed uniformly.
2. They cannot have physically distinct parts.	2. They have physically distinct parts.
3. The constituents cannot be easily seen.	3. The constituents can be easily seen.
4. The constituents cannot be easily separated.	4. The constituents can be easily separated.
5. Example : Sugar solution, soda- water, soft drinks, vinegar, air etc.	5. Example : Sugar and sand mixture, milk, ink, paint, wood, blood etc.

(b)

Homogeneous mixtures: Soda water, air, vinegar, copper sulphate solution , alcholol and water mixture sugar and water mixture


Heterogeneous mixtures: Wood, soil, petrol and water mixture