Eating a chocolate and its digestion involve a physical change and a chemical change. Identify the changes, giving reasons.
Eating a chocolate and its digestion involve a physical change and a chemical change which are as follows:
Physical change: A physical change involves the formation of no new substance and there is no change in the chemical composition of the substance undergoing the change.
Chemical change: A chemical change involves the formation of one or more new substances and there is a change in the chemical composition of the substance undergoing the change.