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Question
Choose the odd one out. Give reason for your choice.
Options
Inflating a balloon
popping a balloon
fading of wall paint
burning of kerosene
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Solution
Inflating a balloon
Reason: Inflating a balloon is a reversible change. The other three are irreversible changes.
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Very Short Answer Type Question:
Give two examples of reversible changes.
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Analogy
Dissolution of glucose : reversible change :: Digestion of food: ___________ change
Most of the physical changes are ______.
The burning of the paper is an irreversible change.
Which of the following change cannot be reversed?
Paheli had bought a new bottle of pickle from the market. She tried to open the metal cap to taste it but could not do so. She then took a bowl of hot water and immersed the upper end of the bottle in it for five minutes. She could easily open the bottle now. Can you give the reason for this?
Can we reverse the following change? If yes, suggest the name of the method.
Water into water vapour
Choose the odd one out. Give a reason for your choice.
