Question

a change in color can indicate a chemical reaction. true false

Explanation:

A change in color is one of the common signs of a chemical reaction. For example, when iron rusts (a chemical reaction), it changes from a metallic color to a reddish - brown color. Another example is the reaction between phenolphthalein (an indicator) and a base. Phenolphthalein is colorless in an acidic or neutral solution but turns pink in a basic solution.

Answer:

True