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Question
Drying of wet clothes in air is an example of
Options
Chemical change
Undesirable change
Irreversible change
physical change
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Solution
Irreversible change
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Very Short Answer Type Question:
Some common changes are given in the below Table. Which of these changes do you think can be reversed?
| Change | Can be reversed |
| (i) Raw egg to boiled egg | Yes/No |
| (ii) Batter to idli | |
| (iii) Wet clothes to dirty clothes | |
| (iv) Woollen yarn to knitted sweater | |
| (v) Grain to its flour | |
| (vi) Cold milk to hot milk | |
| (vii) straight string to a cold string | |
| (viii) Bud to flower | |
| (ix) Milk to paneer | |
| (x) Cow dung to biogas | |
| (xi) stretched rubber band to its normal size | |
| (xii) Melting of ice-cream |
Chemical reactions are example for
Differentiate reversible and irreversible changes.
Analogy
Dissolution of glucose : reversible change :: Digestion of food: ___________ change
Evaporation of water is a reversible change.
Rolling of chapati and baking of chapati are the changes that ______.
Can we reverse the following change? If yes, suggest the name of the method.
Water vapour into water
Can we reverse the following change? If yes, suggest the name of the method.
Curd into milk
Tearing of paper is said to be a change that cannot be reversed. What about paper recycling?
Change of a bud into a flower is a change which cannot be reversed. Give four more such example.
