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The process of fermentation involves the conversion of sugars into which of the following compounds?
Question

The process of fermentation involves the conversion of sugars into which of the following compounds?

A.

Ethene

B.

Ethanoic acid

C.

Methane

D.

Ethanol

Correct option is D

The Correct Answer is: (d) Ethanol
Explanation:
  • Fermentation is a biological process carried out by microorganisms like yeast, in which glucose (sugar) is converted into ethanol (alcohol) and carbon dioxide in the absence of oxygen (anaerobic conditions).
  • This is a form of anaerobic respiration and is commonly used in the brewing and baking industries. 
The chemical equation:

C6H12O6 Yeast 2C2H5OH+2CO2\text{C}_6\text{H}_{12}\text{O}_6 \ \xrightarrow{\text{Yeast}} \ 2\text{C}_2\text{H}_5\text{OH} + 2\text{CO}_2 ​​​

This process is also exothermic, releasing a small amount of energy.

Information Booster:
  • Fermentation is widely used in the production of alcoholic beverages, such as wine and beer.
  • It is also used in bread making; the CO₂ released helps the dough to rise.
  • Louis Pasteur was the scientist who discovered the process of fermentation.
  • Ethanol produced by fermentation is also called bio-ethanol, used as a biofuel.
Additional Information:
  • Ethene – Formed by dehydration of ethanol.
  •  Ethanoic acid – Formed by oxidation of ethanol.
  • Methane – A biogas component, formed by decomposition of organic matter.

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