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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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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.
Find the odd one out. Give reason for your choice.
