What is meant by (i) homogeneous mixtures, and (ii) heterogeneous mixtures? Give two examples of homogeneous mixtures and two of heterogeneous mixtures.

Describe a method to separate a mixture of camphor and sand.

Define a compound. Give two points of evidence to show that sodium chloride is a compound.

What is a physical change? Give two examples of physical changes.

By which method of separation the volatile component from its non-volatile solute can be separated?

Name the process associated with the following: A drop of ink placed on the surface of water contained in a glass spreads throughout the water.

Which of the following are chemical changes?

1. Growth of a plant.
2. Rusting of iron.
3. Mixing of iron filings and sand.
4. Cooking of food.
5. Digestion of food.
6. Freezing of water.
7. Burning of a candle.

How would you separate iodine from a mixture of iodine and common salt?

What is a suspension? Give two examples of suspensions.

Give an example each for the mixture having the following characteristics. Suggest a suitable method to separate the components of these mixtures: Two volatile components with appreciable difference in boiling points.