Match column I with column II.

Matrix:

Column I

Column II
a)
Blowing of balloons and putting them on the wall
Making flowers by paper folding
Making dough balls
Rolling of dough balls to make puries
Heating of oil in a pan

i)
Irreversible change
b)
Bursting of balloon
Cutting of paper
Frying puris in the hot oil

ii)
Reversible change

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a – ii; b – i

a – i; b – ii

a – i; b – i

a – ii; b - ii

answer is A.

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Detailed Solution

The changes which can be reversed are called reversible changes and no new substance is formed in such changes. The changes which cannot be reversed are called irreversible changes, and a new substance or product is formed in such changes. The blowing of balloons, making flowers using origami, making dough balls, rolling dough balls and heating of oil are reversible changes as we can get back the original substance. The bursting of balloons, cutting of paper and frying are irreversible changes where we cannot get back the substance in its original form.

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