Q. Which of the following is correct for a physical change?

1. Only physical properties change.
2. Large amount of heat is absorbed or evolved.

Select the correct answer from the codes given below:
Answer: Only 1
Notes: Properties such as shape, size, colour and state of a substance are called its physical properties. A change in which a substance undergoes a change in its physical properties is called a physical change. A physical change is generally reversible. In such a change no new substance is formed. Physical changes are temporary and reversible. No or very small amount of energy is either absorbed or evolved during a physical change.