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प्रश्न
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?
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उत्तर
A piece of iron on heating can be beaten into desired shape. It is a reversible change because the object of desired shape can be again heated and beated to give the original shape.
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संबंधित प्रश्न
Short Answer Type Question:
What is a chemical change? Explain with example.
Chemical reactions are example for
A stretched rubber band comes back to normal shape. It is an example for ________.
Circle the odd one.
Choose the odd one out. Give reason for your choice.
Inflating a balloon, popping a balloon, fading of wall paint, burning of kerosene
Changes which cannot be reversed are called ______.
Analogy:
Irreversible change: Making idly front batter.
Reversible change: ______.
Look at the figure which shows three situations.
Which of these shows a reversible change and why?
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.
Choose the odd one out. Give reason for your choice.
