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प्रश्न
An iron ring is heated. Which of the following statement about it is incorrect?
पर्याय
The ring expands.
The ring almost comes to the same size on cooling.
The change in this case is reversed.
The ring changes its shape and the change cannot be reversed.
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उत्तर
The ring changes its shape and the change cannot be reversed.
Explanation:
The ring expands on heating and comes back to its original size on cooling. The change is reversible.
APPEARS IN
संबंधित प्रश्न
Analogy
Curdling of milk : irreversible change :: Formation of clouds : ________change
Periodical removal of one of the products of a reversible reaction increases the yield.
To walk through a waterlogged area, you usually shorten the length of your dress by folding it. Can this change be reversed?
What are reversible changes?
Look at the figure which shows three situations.
Which of these shows a reversible change and why?
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.
Ice into water
Give one example of change which occurs on heating but cannot be reversed.
Give one example of change which occurs on cooling but can be reversed.
Choose the odd one out. Give reason for your choice.
