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प्रश्न
Give one example of change which occurs on heating but cannot be reversed.
उत्तर
Baking chapati is an irreversible change.
APPEARS IN
संबंधित प्रश्न
Circle the odd one.
Burning of match stick is a reversible change.
Dissolving sugar in water is a ______ change.
The burning of the paper is an irreversible change.
Analogy:
Irreversible change: Making idly front batter.
Reversible change: ______.
Look at Figure which shows three situations.
Which of these shows a reversible change and why?
Paheli had bought a new bottle of pickle from the market. She tried to open the metal cap to taste it but could not do so. She then took a bowl of hot water and immersed the upper end of the bottle in it for five minutes. She could easily open the bottle now. Can you give the reason for this?
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.
Find the odd one out and give reason for your choice.
Choose the odd one out. Give reason for your choice.
