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प्रश्न
Can we reverse the following change? If yes, suggest the name of the method.
Water into water vapour
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उत्तर
Yes, by condensation water vapour can be converted to water.
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संबंधित प्रश्न
Circle the odd one.
What is reversible change?
Burning of match stick is a reversible change.
Evaporation of water is a reversible change.
Rusting of iron is a reversible change.
Which of the following change cannot be reversed?
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.
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.
