Question

ERCISE TIME
A answer the following questions
1. Describe an activity to show that milk can be changed irreversibly into a new substance.
2. Classify the following into physical and chemical changes:
(1) burning of coal (ii) freezing of water (iii) digestion of food (iv) tearing of paper (1)
dissolving sugar in water (vi) baking of chapati (vii) rotting of food (vii) inflating a balloon
(ix) rusting of iron
3. classify the following as revisable or irreversible change (i) cooking food (ii) melting of wax (iii) ripening of fruits (iv) inflating a balloon (v) ironing of shirt (vi) growth of nail (vii) knitting of a sweater(viii) folding of paper (ix) rusting of iron.
4.classify the following changes is more than one way
(i) inflating a balloon (ii) baking a cake (iii) digestion of food (iv) tearing of paper (v) melting of wax (vi) drywing of wet cement(vii) drawing a picture on a sheet of paper (viii) flowering of a bud (ix) producing biogas from cow dung.
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Answer 1

when converted a milk into curd so, we cannot change curd into a milk

Answer 2

Answer:

when converted a milk into curd so, we cannot change curd into a milk

Explanation:

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