Question

Fill in the blanks:

New substances are formed in a _____ change.

Answer 1

1. Chemical change: A change in which the composition of a substance is altered is called as chemical change.
2. Example: 1. Burning of Paper
   2. Cooking of Food
3. Characteristics of chemical change: 1. When a chemical change occurs a new substance is formed.
   2. A chemical change either absorbs or gives out a lot of heat energy.
   3. In a chemical change the mass of the substances changes.
   4. Chemical change is an irreversible process.

Therefore, New substances are formed in a chemical change.