Solution:
The above statement is true.Chemical changes are the changes in which new substances are formed. Chemical changes are irreversible. Chemical reactions may accompany a change in colour, evolution of heat and gas etc. Digestion of food is a chemical change because complex macromolecules like carbohydrates, fats and proteins are broken down into simpler organic molecules with the formation of energy. Baking also leads to the formation of new substances (bread, cake etc.) from the raw materials, including flour, yeast, sugar etc., with heat application.
