Which of the following is the IUPAC name of C₂H₅OH?  

The correct answer is Ethanol

Key Points

• The molecular formula C₂H₅OH represents the compound ethanol.
• In IUPAC nomenclature, the "-ol" ending indicates the presence of a hydroxyl (-OH) group, which classifies the compound as an alcohol.
• The "eth-" prefix suggests the presence of two carbon atoms. Combining these two components, we get "ethanol".
• Ethanol is a commonly used alcohol, found in alcoholic beverages, hand sanitizers, and is also used as a fuel and solvent.
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Additional Information

• Propanol : Propanol (either isopropanol or n-propanol depending on structural configuration) has the molecular formula C₃H₇OH, which contains three carbon atoms, not two. Thus it cannot represent C₂H₅OH.
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• Methenol : There is no commonly recognized compound under the name "methenol" in standard nomenclature. The closest would be methanol, CH₃OH, which contains just one carbon atom. Thus, it does not match with the given formula C₂H₅OH.
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• Butanol : Butanol (C₄H₉OH) has four carbon atoms. "But-" prefix in IUPAC nomenclature denotes 4 carbon atoms, so it cannot represent the compound C₂H₅OH.
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So the correct anme will be Ethanol