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प्रश्न
Can we reverse the following change? If yes, suggest the name of the method.
Curd into milk
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उत्तर
Curd into milk is an irreversible process.
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संबंधित प्रश्न
Very Short Answer Type Question:
Give two examples of reversible changes.
Chemical reactions are example for
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 |
Choose the odd one out. Give reason for your choice.
Periodical removal of one of the products of a reversible reaction increases the yield.
Boojho’s sister broke a white dove, a symbol of peace, made of Plaster of Paris (POP). Boojho tried to reconstruct the toy by making a powder of the broken pieces and then making a paste by mixing water. Will he be successful in his effort? Justify your answer.
Tearing of paper is said to be a change that cannot be reversed. What about paper recycling?
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.
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.
Choose the odd one out. Give reason for your choice.
