EXERCISE Question 1. Define: (a) matter Answer: (a) Matter is anything which has mass, occupies space and can be perceived by our senses. Example: Air, book. (b) intermolecular force of attraction. Answer: The molecules of matter are always in motion and attract each other with a force called intermolecular force of attraction due to which they are held together. Question 2. What are the three states of matter? Define each of them with two examples. Answer: The three states of matter are solids, liquids and gases • Solids — A solid has a definite shape and definite volume. Example – wood, stone, iron, ice etc. • Liquid — A liquid has a definite volume but not definite shape. Example — water, juice, milk, oil, etc. • Gases — A gas neither has definite shape nor a definite volume. Example – air, hydrogen, oxygen, water vapour etc. Question 3. Define interconversion ...
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