Question

. Give one example in each case: a. Change which occurs on heating, but can be reversed. b. Change which occurs on cooling, but can be reversed. c. Change which occurs on heating, but cannot be reversed.

Answer 1

Answer:a]mixing of salt in water is a change that can be reversed by heating and melting of salt.

b]The softening of iron on heating to red hot stage is a reversible change. And when the hot iron is cooled, it becomes hard again.

c] Size of the candle was reducing. Melted wax was getting solidified.

Explanation:

Answer 2

Answer:

a) Mixing of Salt in water

b) The softening of iron

c) Size of the candle was reducing. Melted wax was getting solidified.

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