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Question
Give one example of change which occurs on heating but cannot be reversed.
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Solution
Baking chapati is an irreversible change.
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RELATED QUESTIONS
Very Short Answer Type Question:
Can you say deforestation is an irreversible or reversible change?
Very Short Answer Type Question:
Some common changes are given in the below Table. Which of these changes do you think can be reversed?
| Change | Can be reversed |
| (i) Raw egg to boiled egg | Yes/No |
| (ii) Batter to idli | |
| (iii) Wet clothes to dirty clothes | |
| (iv) Woollen yarn to knitted sweater | |
| (v) Grain to its flour | |
| (vi) Cold milk to hot milk | |
| (vii) straight string to a cold string | |
| (viii) Bud to flower | |
| (ix) Milk to paneer | |
| (x) Cow dung to biogas | |
| (xi) stretched rubber band to its normal size | |
| (xii) Melting of ice-cream |
Long Answer Type Question:
Explain how a metal rim slightly smaller than a wooden wheel can be fixed on it.
A stretched rubber band comes back to normal shape. It is an example for ________.
Circle the odd one.
What is reversible change?
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
Give one example of change occurs on mixing two substances, but can be reversed.
Find the odd one out. Give reason for your choice.
