Question

Which statement best describes the difference between a physical change and a chemical change?

Answer 1

Answer: Option (b) is the correct answer.

Explanation:

A change that does not lead to any difference in chemical composition of a substance is known as a physical change.

For example, shape, size, mass, volume, density, boiling point, etc of a substance are all physical properties.

On the other hand, changes that lead to bring change in chemical composition of a substance is known as a chemical change.

For example, exploding dynamite, rotting cheese, combustion, oxidation etc are all chemical changes.

Thus, we can conclude that the statement a physical change is a change from one state of matter to another; a chemical change results in a new substance formed, is correct.

Answer 2

Answer:

The answer is letter C

Explanation: