2. Some sugar solution is taken in test tube and little substance X is added in powder form. The mouth of test tube is closed with cork and allowed to stand for some time. On opening the cork, a characteristic smell of substance Y is obtained, and gas Z is also formed. The gas Z extinguishes a burning matchstick.
a. What could be X, Y and Z.
b. What is the process of converting sugar into substances Y by the action of X known as?
c. Which type of respiration is exhibited by X in above process?
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Answer:
x could be yeast spores
y must be ethyl alcohol, has a characteristic smell
z must be CO2...... it is used as fire extinguisher
The process of converting glucose to ethyl alcohol and carbondioxide via pyruvic acid is called alcoholic fermentation, an anaerobic respiratory pathway
Anaerobic respiration
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