A solution of salt water is boiled. The water evaporates and solid salt remains. Which statement is true?

Question

A.
The salt and the water have both undergone chemical changes.

B.
The salt has undergone a physical change, and the water has undergone a chemical change.

C.
The salt has undergone a chemical change, and the water has undergone a physical change.

D.
The salt and the water have both undergone physical changes.

Answer 1

The correct statement is:

D. The salt and the water have both undergone physical changes.

When salt water is boiled, the water evaporates (a physical change), leaving the salt behind. The chemical composition of both the salt and the water remains unchanged during this process. Therefore, no chemical changes occur.