Question 1: Classify the changes involved in the following processes as physical or chemical changes: (a) Photosynthesis (b) Dissolving sugar in water (c) Burning of coal (d) Melting of wax (e) Beating aluminium to make aluminium foil (f) Digestion of food

Answer:(a) Photosynthesis → Chemical change (b) Dissolving sugar in water → Physical change (c) Burning of coal → Chemical change (d) Melting of wax → Physical change (e) Beating aluminium to make aluminium foil → Physical change (f) Digestion of food → Chemical change