Question

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

Answer 1

Answer is: C. The salt and the water have both undergone physical changes.

The salt and the water make a homogeneous mixture (the same proportions of its components throughout any given sample).

A physical change occurs when a substance changes phase.

Boiling is a physical change (process), the same substance is present before and after the change, so chemical bonds and melting point of the substance are not changed.

Chemical change is when new substances are formed, the atoms are rearranged and the reaction is followed by an energy change.

Answer 2

The answer would be C.  

The salt and the water have both undergone physical changes.

Hope this helps!