question_answer 4)

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