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प्रश्न
Paheli mixed flour and water and
- made a dough,
- rolled the dough to make a chapati,
- baked the chapati on a pan,
- dried the chapati and ground it in a grinder to make powder.
Identify the changes (i) to (iv) as the changes that can be reversed or that cannot be reversed.
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उत्तर
- Making of dough from flour and water is an irreversible change.
- Rolling the dough to make a chapati is reversible change.
- Baking the rolled chapati on a pan is an irreversible change.
- Grinding of dried chapati in a grinder is an irreversible change.
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संबंधित प्रश्न
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 |
Long Answer Type Question:
How does curd being set? Is this change reversible?
Drying of wet clothes in air is an example of
Magnet attracts iron needle.This is ______ change.
Analogy
Dissolution of glucose : reversible change :: Digestion of food: ___________ change
Differentiate reversible and irreversible reactions.
To walk through a waterlogged area, you usually shorten the length of your dress by folding it. Can this change be reversed?
Changes which cannot be reversed are called ______.
Pick the change that can be reversed from the following.
Choose the odd one out. Give reason for your choice.
