Question

How would you justify whether the reactivity is chemical or physical property?

Answer 1

Hint: In order to determine whether the reactivity is chemical or physical property, we must first have an idea about what a chemical and physical property is. Also, we should know what are the things that will come under the chemical and the physical properties.

Complete answer:
Let us first understand what reactivity is. Reactivity is said to be the impetus with which a chemical substance will undergo a chemical reaction. This chemical reaction can take place within itself or with other substances. During this process there will be release of energy. Therefore, we can surely say that reactivity is a chemical property.
Whenever there is a change in the chemical property, we can surely say that there will be change in the physical property. But whenever there is a change in the physical property, we cannot say that the chemical property of the substance will change.
Therefore, we can conclude by saying that the reactivity is the chemical property.

Note: We have to know about the difference between the chemical and physical properties.

CHEMICAL PROPERTIES	PHYSICAL PROPERTIES
This property is observed only when a substance undergoes a chemical change.	This property can be observed even when the substance does not undergo the chemical change.
The chemical properties are connected to the chemical bonds of the substance.	The physical property will not show such a relationship.
Viscosity, compressibility, heat of combustion, reactivity and flammability all will come under the chemical properties.	Odor, shape, color, molecular weight, boiling point and melting point all will come under the physical properties.