determine following are which types pf change (1) Burning of coal (2) Melting of wax (3) Digestion of food (4) Photosynthesis
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Explanation:
photosynthesis
photo means sunlight and synthesis means manfactured food in take of chollrophyll to presence of carbon dioxide
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Basic difference
Physical change : in this no new substance is formed
Chemical change : new substance with new properties is formed
Melting of wax is a physical change
Rest all are chemical changes
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