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प्रश्न
Choose the odd one out. Give reason for your choice.
Inflating a balloon, popping a balloon, fading of wall paint, burning of kerosene
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उत्तर
Inflating a balloon
Reason:
Inflating a balloon is a reversible change. The other three are irreversible changes.
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संबंधित प्रश्न
Short Answer Type Question:
What is a physical change? Explain with example.
Differentiate reversible and irreversible changes.
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
To walk through a waterlogged area, you usually shorten the length of your dress by folding it. Can this change be reversed?
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
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
Give one example of change which occurs on heating but can be reversed.
Give one example of change which occurs on heating but cannot be reversed.
