Classify the changes involved in the following process as physical, chemical.
Burning of coal, melting of wax, beating aluminum to make aluminum foil,
digestion of food , boiling of egg , photosynthesis , cutting of wood , ripening of
mango , breaking glass.
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Burning of coal-chemical
Melting of wax-physical
beating aluminum to make aluminum foil-physical
digestion of food-chemical
boiling of egg-chemical
photosynthesis-chemical
cutting of wood-physical
ripening of mango-chemical
breaking glass-physical
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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
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