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प्रश्न
A food stall owner was preparing dough for making bhaturas. He added a pinch of yeast and sugar to the dough and left it in a warm place. After a few hours, the dough had risen. There was a sour smell too.
Why did the dough smell sour?
उत्तर
Production of alcohol during anaerobic respiration by yeast results in a sour smell.
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