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प्रश्न
Give one example of change which occurs on mixing two substances, but cannot be reversed.
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उत्तर
Mixing of cement and water is an irreversible change.
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संबंधित प्रश्न
Short Answer Type Question:
What is a chemical change? Explain with example.
Chemical reactions are example for
To walk through a waterlogged area, you usually shorten the length of your dress by folding it. Can this change be reversed?
Changes which cannot be reversed are called ______.
What are irreversible changes?
An iron ring is heated. Which of the following statement about it is incorrect?
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.
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. Give reason for your choice.
Choose the odd one out. Give reason for your choice.
