Advertisements
Advertisements
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.
Advertisements
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
Short Answer Type Question:
What is a chemical change? Explain with example.
Long Answer Type Question:
Explain how a metal rim slightly smaller than a wooden wheel can be fixed on it.
Evaporation of water is a reversible change.
Rusting of iron is a reversible change.
What are irreversible changes?
Differences between
reversible and irreversible changes are:
A piece of iron is heated till it becomes red-hot. it then becomes soft and is beaten to a desired shape. What kind of changes are observed in this process-reversible or irreversible?
Can we reverse the following change? If yes, suggest the name of the method.
Ice into water
Conversion of ice into water and water into ice is an example of change which can be reversed. Give four more examples where you can say that the changes can be reversed.
Circle the odd one out. Give a reason for your choice.
