Question

Adding sodium chloride to water is a:
(A) Physical change
(B) Chemical change
(C) Chemical reaction
(D) None of these

Answer 1

Hint: There is a large variety of chemical reactions that take place around us. The various types of chemical reactions and the following observations help to determine whether a chemical reaction has taken place as a change in a physical change in physical state, change in color, evaluation of gas, and temperature change.

Complete step by step answer:
Chemical change:
A chemical change is defined as the change occurs in the chemical composition and resulting in the formation of new compounds or substances. This process is not a reversible reaction.
Physical change:
This type of change is limited to change that makes a difference in a display without changing in the composition. Physical change is defined as the change in shape and size of substance, where there is no change in chemical composition. This physical change resulting in no new substance will form and this is only a physical reversible reaction.

Given, adding sodium chloride to water is a physical change, because sodium chloride can be easily extracted from water by an evaporation method which means this process indicates a reversible process.
So, the correct answer is “Option A”.

Note: Melting of solids to liquids, vaporization of liquids to gases, liquefaction of gases to solids, etc are the examples of physical change. Decaying matter, combustion reactions, chemical battery usage, etc are examples of chemical change.