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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 reversible changes.
Very Short Answer Type Question:
Give two examples of irreversible changes.
Short Answer Type Question:
What happens when sugar is heated?
Circle the odd one.
Circle the odd one.
Choose the odd one out. Give reason for your choice.
Inflating a balloon, popping a balloon, fading of wall paint, burning of kerosene
Water on ______ changes to ice and on ______ comes back to water.
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
Give one example of change which occurs on heating but cannot be reversed.
