Give Reasons for the following in brief.
The formation of the mixture does not involve any chemical change.
Mixture doesn't involve any chemical change:
Give an example of each of the following chemical changes.
(a) A reaction involving.
(i) Change of state.
(ii) Formation of the precipitate.
(b) An exothermic and an endothermic reaction involving carbon as one of the reactants.
(c) A reaction where the colour change is noticed.
The formation of a mixture does not involve any change in energy.
Eating a chocolate and its digestion involve a physical change and a chemical change. Identify the changes, giving reasons.