Chapter 15, Problem 20R

To determine

To choose: The correct option.

Answer to Problem 20R

Option (B)

Explanation of Solution

Introduction:

The chemical change is a process that occurs when a substance is transformed into new substance with its new properties as compared to the original substance.

The chemical change is an irreversible process. It means that when a substance undergoes a chemical change, then it cannot be transformed into original form. In this process, change in physical appearance occurs.

The physical change is a process that occurs when the size, phase or shape of a substance changes but the properties remains same. In case of melting, boiling and evaporation, only change of phase occurs.

Burning involves oxidation where oxygen reacts with an element. This leads to the change in physical appearance in the element. Hence, burning is an example of the chemical change.

Conclusion:

Thus, the correct option is (B).