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प्रश्न
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.
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उत्तर
- Making of dough from flour and water is an irreversible change.
- Rolling the dough to make a chapati is reversible change.
- Baking the rolled chapati on a pan is an irreversible change.
- Grinding of dried chapati in a grinder is an irreversible change.
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संबंधित प्रश्न
Short Answer Type Question:
What is a chemical change? Explain with example.
Changes which cannot be reversed are called ______.
Water on ______ changes to ice and on ______ comes back to water.
The burning of the paper is an irreversible change.
Differences between
reversible and irreversible changes are:
While lighting a candle, Paheli observed the following changes.
- Wax was melting
- Candle was burning
- Size of the candle was reducing
- Melted wax was getting solidified.
Of the above, the changes that can be reversed are
Can we reverse the following change? If yes, suggest the name of the method.
Curd into milk
Give one example of change occurs on mixing two substances, but can be reversed.
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.
Choose the odd one out. Give reason for your choice.
