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प्रश्न
Which of the following changes cannot be reversed?
- Blowing of a balloon
- Folding paper to make a toy aeroplane
- Rolling a ball of dough to make roti
- Baking cake in an oven
- Drying a wet cloth
- Making biogas from cow dung
- Burning of a candle
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उत्तर
The following changes are irreversible:
d. Baking cake in an oven.
f. Making biogas from cow dung.
g. Burning of a candle.
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संबंधित प्रश्न
Match the following.
| Bud to flower | Dr. A.P.J. Abdul Kalam |
| Reversible change | Recyclable waste |
| India 2020 | Organic waste |
| Paper | Melting of ice |
| Vegetables | Irreversible change |
Circle the odd one.
Changes which cannot be reversed are called ______.
Dissolving sugar in water is a ______ change.
Salt can be separated from its solution (salt dissolved in water), because ______.
Can we reverse the following change? If yes, suggest the name of the method.
Water into water vapour
Give one example of change which occurs on heating but cannot be reversed.
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.
Find the odd one out. Give reason for your choice.
Choose the odd one out. Give reason for your choice.
