Idly batter is steamed to get idly.is it a irreversible change or a reversible change? How?
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Solution

It is irreversible change because at once it is steamed it cannot be converted back to the batter..
it is Thus a Chemical change...
Idli batter already undergoes fermentation process and on being steamed it changes to different form that converted back to its original form , hence it is irreversible change.

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