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प्रश्न
Give one example of change which occurs on heating but can be reversed.
एक पंक्ति में उत्तर
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उत्तर
An iron rod’s heating is a reversible process.
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संबंधित प्रश्न
Very Short Answer Type Question:
Give two examples of reversible changes.
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.
Dissolving sugar in water is a ______ change.
Evaporation of water is a reversible change.
What are reversible changes?
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
Tearing of paper is said to be a change that cannot be reversed. What about paper recycling?
Give one example of change which occurs on cooling but can be reversed.
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.
