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प्रश्न
Pick the change that can be reversed from the following.
विकल्प
Cutting of trees
Melting of ghee
Burning of candle
Blooming of flower
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उत्तर
Melting of ghee
Explanation:
The melted ghee can be frozen again hence this change can be reversed. Cutting of trees, burning of candle and blooming of flower cannot be reversed.
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संबंधित प्रश्न
An example for reversible change is
What is reversible change?
Analogy
Curdling of milk : irreversible change :: Formation of clouds : ________change
Water changes into ice on cooling is an example of ______.
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Which of these shows a reversible change and why?
A piece of iron is heated till it becomes red-hot. it then becomes soft and is beaten to a desired shape. What kind of changes are observed in this process-reversible or irreversible?
Can we reverse the following change? If yes, suggest the name of the method.
Water vapour into water
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.
