Question

b) (i) Distinguish between physical and chemical changes
(ii) How can we identity a physical change as either reversible or irreversible?
Use examples to support your answer.​

Answer 1

Explanation:

The change in which the molecular composition is completely altered and a new product is formed is called a chemical change.

Chemical changes create a new product. this is chemical change

physical change-

During the physical change, the arrangement of molecules is altered leading to change in state. No new products are formed, and the molecular composition remains totally the same. For example, the molecular composition of ice and water is not altered.

Answer 2

Answer:

chal hat yahan se

Explanation:

tu sudhre ga nahi