Physical and Chemical Changes

Question 1

Name a few physical properties of matter.

Answer 1

Colour, hardness, rigidity, fluidity, density, melting point, boiling point.

Question 2

The interconversion of states is a physical change. True of False. Justify.

Answer 2

True. These changes occurs without a change in composition and no change in the chemical nature of the subject.

Question 3

What is chemical change?

Answer 3

1. one substance reacts with another to undergo a change in chemical composition.
2. brings a change in the chemical properties of matter and we get new substances.