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प्रश्न
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
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उत्तर
The following changes are irreversible:
d. Baking cake in an oven.
f. Making biogas from cow dung.
g. Burning of a candle.
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संबंधित प्रश्न
Very Short Answer Type Question:
Give two examples of irreversible changes.
Long Answer Type Question:
How does curd being set? Is this change reversible?
Formation of curd from milk is
A drawing sheet changes when you draw a picture on it. Can you reverse this change?
Give examples to explain the difference between changes that can or cannot be reversed.
The blackening of the Silver anklet is a (an) ______.
Rolling of chapati and baking of chapati are the changes that ______.
Can we reverse the following change? If yes, suggest the name of the method.
Water vapour into water
Change of a bud into a flower is a change which cannot be reversed. Give four more such example.
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.
