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प्रश्न
When a candle is lit the following changes are observed.
- Wax melts.
- Candle keeps burning.
- The size of the candle decreases.
- The molten wax solidifies
- Which of the changes can be reversed? Justify your answer
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उत्तर
- Wax melting is a reversible change.
- “The molten wax solidifies” is a reversible change.
These two changes can be reversible to get back to the original state. So the above two changes are reversible changes.
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संबंधित प्रश्न
Very Short Answer Type Question:
Give two examples of irreversible changes.
Drying of wet clothes in air is an example of
Analogy
Curdling of milk : irreversible change :: Formation of clouds : ________change
Changes which cannot be reversed are called ______.
Salt can be separated from its solution (salt dissolved in water), because ______.
Rolling of chapati and baking of chapati are the changes that ______.
Look at the figure which shows three situations.
Which of these shows a reversible change and why?
Can we reverse the following change? If yes, suggest the name of the method.
Water into water vapour
Find the odd one out and give reason for your choice.
Circle the odd one out. Give a reason for your choice.
