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