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प्रश्न
What is reversible change?
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उत्तर
Changes which can be reversed are called reversible change.
Eg: melting of ice.
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संबंधित प्रश्न
Very Short Answer Type Question:
Give two examples of irreversible changes.
Formation of curd from milk is
A drawing sheet changes when you draw a picture on it. Can you reverse this change?
Which of the following change cannot be reversed?
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?
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.
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.
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.
