Question

Why the idli batter rises when kept overnight without refrigeration?​

Answer 1

Answer:

Here is your answer

The dough prepared for making idli rises when kept overnight because of the production of carbon dioxide gas in it. This gas is produced as a byproduct of process of fermentation.

Answer 2

Answer:

fermentation

Explanation:

the micro oraganisms multiply themselves and in the morning since its warm because of the sun the batter rises