What kind of properties can only be observed when a substance changes into a different substance? physical properties reaction properties chemical properties changing properties

Answer:C. Chemical propertiesExplanation:

By its very definition, a chemical property is one which is exhibited as a result of a chemical reaction. This may happen during or after the reaction. This is because in a chemical reaction there is a transformation in the physical composition of the components and this directly affects its chemical properties.

When a substance changes into a different substance, you are observing its chemical properties.

In a physical change, the substance must not change into a different substance.

The physical and chemical properties of a substance do not change.