Question

A man took 375 ml of water in a beaker and dissolve 2-3 teaspoon of sugar in it and also added half a spoon of powder A to the solution he kept the solution in the workplace after 4-5 he observed the smell of alcohol coming from that solution here powder A is of

Answer 1

Powder A here is yeast. Yeast undergoes fermentation when dissolved in sugar solution when kept in a warm place.