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प्रश्न
An iron ring is heated. Which of the following statement about it is incorrect?
विकल्प
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.
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संबंधित प्रश्न
Short Answer Type Question:
What happens when sugar is heated?
What is reversible change?
Differentiate reversible and irreversible changes.
What are irreversible changes?
Differences between
reversible and irreversible changes are:
The blackening of the Silver anklet is a (an) ______.
Can we reverse the following change? If yes, suggest the name of the method.
Ice into water
Give one example of change occurs on mixing two substances, but can be reversed.
Paheli mixed flour and water and
- made a dough,
- rolled the dough to make a chapati,
- baked the chapati on a pan,
- dried the chapati and ground it in a grinder to make powder.
Identify the changes (i) to (iv) as the changes that can be reversed or that cannot be reversed.
Circle the odd one out. Give reason for your choice.
