Question

If two substances combine to form a new substance with different properties, a __________ change has occurred.

Answer 1

Explanation:

When two substances chemically combine together then it results in the formation of a new compound whose chemical properties are different from the reactant species.

Thus, there will be change in the chemical composition when reactants combine together.

Therefore, we can conclude that if two substances combine to form a new substance with different properties, a chemical change has occurred.

Answer 2

If two substances combine to form a new substance with different properties, a chemical change has occured. Chemical changes may incur change in color, reactivity, state, and other extensive and intensive properties. This is not a result of physical change since change of state is only involved.