Which statement is true of a chemical change?

Question

A.
It involves changes in the molecular structure.
B.
It involves changes in phase but not changes in the molecular structure.
C.
It involves dissolving one substance into another.
D.
It involves a change in the state, or phase, of a substance.
E.
It involves the process of separating two or more dissolved substances.

Answer 1

The true statement regarding a chemical change is:

A. It involves changes in the molecular structure.

Chemical changes occur when substances undergo a transformation that alters their molecular structure, resulting in the formation of new substances with different properties. The other options describe physical changes rather than chemical changes.