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Science CBSE Homework Assignments
Class 7
Physical and chemical changes
Changes - Physical & chemical
1.
Physical and chemical change I
Question:
3
m.
Classify the changes involved in the following processes as physical or chemical changes:
(d)
. Melting of wax.
Chemical changes
Physical changes
No changes
(e)
. Beating aluminium to make aluminium foil.
Chemical changes
Physical changes
No changes
(f)
. Digestion of food.
Chemical changes
Physical changes
No changes
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