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प्रश्न
Rolling of chapati and baking of chapati are the changes that ______.
विकल्प
can be reversed.
cannot be reversed.
can be reversed and cannot be reversed, respectively.
cannot be reversed and can be reversed, respectively.
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उत्तर
Rolling of chapati and baking of chapati are the changes that can be reversed and cannot be reversed, respectively.
Explanation:
Rolling of chapati is a physical reversible change because there is no change in the properties of kneaded flour. Once the chapati is baked it cannot be reversed.
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संबंधित प्रश्न
Chemical reactions are example for
Differentiate reversible and irreversible changes.
When a candle is lit the following changes are observed.
- Wax melts.
- Candle keeps burning.
- The size of the candle decreases.
- The molten wax solidifies
- Which of the changes can be reversed? Justify your answer
Change is the ______ of a substance from one form to another.
Evaporation of water is a reversible change.
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
Which of the following changes cannot be reversed?
- Blowing of a balloon
- Folding paper to make a toy aeroplane
- Rolling a ball of dough to make roti
- Baking cake in an oven
- Drying a wet cloth
- Making biogas from cow dung
- Burning of a candle
Give one example of change which occurs on heating but can be reversed.
Choose the odd one out. Give a reason for your choice.
