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
NCERT Solutions for Class 7th Science Chapter 6 Physical and Chemical Changes Page 65 Exercise Question 1



(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