Question

when some wheat dough was left in the open for a few days it started emitting a foul smell state why

Answer 1

When wheat dough is left in open, formation of fungus and reproduction of yeast present in it starts taking place. Growth of fungus gives it a foul smell and presence of this microorganism makes it unfit for consumption.

Answer 2

When, the wheat dough left in the open for a few days, starts emitting foul smell due to the action of bacteria and fungi that grow on it.