Question

Give one example in each case:
(a) Change which occurs on heating but can be reversed.
(b) Change which occurs on heating but cannot be reversed.
(c) Change which occurs on cooling but can be reversed.
(d) Change which occurs on mixing two substances, but can be reversed.
(e) Change which occurs on mixing two substances, but cannot be reversed.

Answer 1

Answer:

a) moulding metals

b) burning paper

c) freezing ice

d) forming salt solution

e) mixing cement and water

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