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प्रश्न
Which of the following change cannot be reversed?
पर्याय
Hardening of cement
Freezing of ice cream
Opening a door
Melting of chocolate
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उत्तर
Hardening of cement
Explanation:
Hardening of cement is cannot be reversed because once hardened it cannot come back to its original shape.
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संबंधित प्रश्न
What is reversible change?
Differentiate reversible and irreversible changes.
Differentiate reversible and irreversible reactions.
A drawing sheet changes when you draw a picture on it. Can you reverse this change?
Water changes into ice on cooling is an example of ______.
Name the two types of changes.
An iron ring is heated. Which of the following statement about it is incorrect?
Can we reverse the following change? If yes, suggest the name of the method.
Water into water vapour
Can we reverse the following change? If yes, suggest the name of the method.
Water vapour into water
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.
