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प्रश्न
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.
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उत्तर
Examples of reversible changes.
- Melting of wax
- Folding of a paper
- Inflating a tyre or balloon
- Knitting of a sweater
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संबंधित प्रश्न
To walk through a waterlogged area, you usually shorten the length of your dress by folding it. Can this change be reversed?
Give examples to explain the difference between changes that can or cannot be reversed.
Change is the ______ of a substance from one form to another.
Dissolving sugar in water is a ______ change.
Salt can be separated from its solution (salt dissolved in water), because ______.
Give one example of change occurs on mixing two substances, but 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.
Select the odd one out. Give reason for your the choice
Choose the odd one out. Give a reason for your choice.
Choose the odd one out. Give reason for your choice.
