Question 17

Conversion of ice into water and water into ice is an example of change which can be reversed. Give four more examples where you can say that the changes can be reversed.

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Solution

Changes that can be reversed are called reversible changes. Some examples are as follows:
Melting of wax
Folding of a paper
Knitting of a sweater
Inflating of a tyre

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Question 18

Change of a bud into a flower is a change which cannot be reversed. Give four more such example.

Question 11

Can we reverse the following changes? If yes, suggest the name of the method.
Water into water vapour
Water vapour into water
Ice into water
Curd into milk

Question 2:
Can we reverse the following changes? If yes, suggest the name of the method.

(a) Water into water vapour

(b) Water vapour into water

(c) Ice into water

(d) Curd into milk

Question 5

Give examples to explain the difference between changes that can or cannot be reversed.

Q. Can we reverse the following change? If yes, suggest the name of the method.
(a) Water into water vapour
(b) Water vapour into water
(c) Ice into water
(d) Curd into milk.

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Question 17 Conversion of ice into water and water into ice is an example of change which can be reversed. Give four more examples where you can say that the changes can be reversed.

Changes that can be reversed are called reversible changes. Some examples are as follows: Melting of wax Folding of a paper Knitting of a sweater Inflating of a tyre

Question 17

Conversion of ice into water and water into ice is an example of change which can be reversed. Give four more examples where you can say that the changes can be reversed.

Changes that can be reversed are called reversible changes. Some examples are as follows:
Melting of wax
Folding of a paper
Knitting of a sweater
Inflating of a tyre