Question

what happens to idly dough when it is kept in room temperature at summer day?????

Answer 1

if it will kept in summer it will spoil and can't be eaten.it taste and ouder will be not good at all.

Answer 2

The idly get sour and spoiled and cannot be eaten, because the Micro-organisms act faster as the temperature and season is suitable for their growth on the dough and hence it becomes unfit for eating.
It is a chemical reaction which takes place and hence it is not reversible.