Question

Answer question numbers 3.1-3.4 on the basis of your understanding of the following paragraph and the related
studied concepts.
(The interconversion of states is a physical change because these changes occur without a change in composition
and no change in the chemical nature of the substance. Although(ice, water and water vapourall look onteren
and display different physical properties, they are chemically the same.
Burning is a chemical change. During this process one substance reacts with other to undergo a change in
chemical composition. Chemical change brings change in the chemical properties of matter and we get new
substances.
3.1 Define physical change.
3.2 In which change, new substance is formed? chemical change
3.3 Give an example for physical change.
3.4 Mention the solid form of water.​

Answer 1

Answer:

3.1

The changes which occur without a change in chemical composition or in the chemical nature of the substance are known as physical changes.

3.2

In chemical changes, new substances are formed.

3.3

Examples of physical changes are Melting an ice cube,Boiling water,Shredding paper,Chopping wood,etc

3.4

Water in its solid form is known as ice.