Correct option is D
- 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.
This process is also exothermic, releasing a small amount of energy.
- 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.
- Ethene – Formed by dehydration of ethanol.
- Ethanoic acid – Formed by oxidation of ethanol.
- Methane – A biogas component, formed by decomposition of organic matter.