Question

Wheat dough if left in the open, after a few days, starts to emit

a foul smell and becomes unfit for use. Give reason​

Answer 1

When the wheat dough is kept in open for few days, the formation of fungus and reproduction of yeast takes place. These fungi and yeast will become unfit for eating or for use. Since the formation of fungus takes place in the dough, it gives a foul smell.