Chapter 15, Problem 24R

To determine

To choose: The correct option.

Answer to Problem 24R

Option (B)

Explanation of Solution

Introduction:

The physical change is a process that occurs when the size, phase or shape of a substance changes but the properties remains same.

A property in which chemical nature of a substance remain intact is known as physical properties, whereas a property in which chemical nature of a substance changes is known as chemical properties.

The physical change is a reversible process. During this process, chemical nature of a substance remains same.

The process of conversion of water into vapor is known as evaporation. In this process, the physical appearance of water is changing, that is, change of liquid state into gaseous state but the particles of both the state remain same. The water and vapor both consist of one oxygen and two hydrogen atoms. Hence, there is only a physical change but not any chemical change. Thus,the correct option is (B).

Conclusion:

Thus, the correct option is (B).