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प्रश्न
Chemical reactions are example for
पर्याय
reversible change
irreversible change
both of them
none of them
उत्तर
Irreversible change
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संबंधित प्रश्न
Long Answer Type Question:
Explain how a metal rim slightly smaller than a wooden wheel can be fixed on it.
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 |
Analogy
Curdling of milk : irreversible change :: Formation of clouds : ________change
The burning of the paper is an irreversible change.
Which of the following change cannot be reversed?
Salt can be separated from its solution (salt dissolved in water), because
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
Give one example of change occurs on mixing two substances, but can be reversed.
A potter working on his wheel shaped a lump of clay into a pot. He then baked the pot in an oven. Do these two acts lead to the same kind of changes or different? Give your opinion and justify your answer.
Change of a bud into a flower is a change which cannot be reversed. Give four more such example.
