Answer: Option (c) is the correct answer.
Explanation:
A specific temperature at which a substance is changing from solid state to liquid state is known as boiling point.
When there occurs no change in chemical composition of a substance then it is known as a physical property.
For example, when ice melts it changes into liquid.
Whereas when there occurs change in chemical composition of a substance then it is known as a chemical property.
For example, formation of methane gas from carbon and hydrogen atom is a chemical change.
Thus, we can conclude that the specific temperature at which a substance changes from a liquid to a gas is an example of a physical property.
