Some sugar solution is taken in a test-tube and a little of substance X in powder form is added to it. The mouth of test-tube is closed with a cork and allowed to stand for some time. On opening the cork, a characteristic smell of substance Y is obtained and a gas Z is also observed to be formed. The gas Z extinguishes a burning matchstick.
(a) What could be (i) X, (ii) Y, and (iii) Z?
(b) What is the process of converting sugar into substance Y by the action of X known as?
(c) What type of respiration is exhibited by X in the above process?

Question

Some sugar solution is taken in a test-tube and a little of substance X in powder form is added to it. The mouth of test-tube is closed with a cork and allowed to stand for some time. On opening the cork, a characteristic smell of substance Y is obtained and a gas Z is also observed to be formed. The gas Z extinguishes a burning matchstick.
(a)	What could be (i) X, (ii) Y, and (iii) Z?
(b)	What is the process of converting sugar into substance Y by the action of X known as?
(c)	What type of respiration is exhibited by X in the above process?

MyClass24 · Accepted Answer

(i) X is yeast (ii) Y is ethanol (iii) Z is carbon dioxide


Fermentation


X exhibits the anaerobic