22. How do the following changes differ from each other?
(a) Inflating a balloon
(b) Bursting an inflated balloon
23. Classify the following as reversible and irreversible change.
(a) Knitting of sweater
(b) Boiling of an egg
(c) Growth of nails
(d) Folding of paper
(e) Making biogas from cow-dung
.
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inflating balloon is a reversible change. bursting inflated balloon is a irreversible change.
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Answer:
23. a) reversible change.
b) irreversible change.
c) irreversible change.
d) reversible change.
e) irreversible change.
22. Inflating a balloon is a reversible change as we can get back the original balloon but bursting of an inflated balloon is an irreversible change as we can not get back the original balloon as it is deflated.
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