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Q.

The IUPAC name of the acid present in vinegar is:

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a

Lactic acid

b

Acetic acid

c

Formic acid

d

Ethanoic acid

answer is B.

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Detailed Solution

Vinegar is a solution of 4-6% of acetic acid( CH3COOH) in water.

 

According to IUPAC nomenclature rule, CH3COOH contains two carbon atoms. So, the root word 'eth' should be used for two carbon atoms. As the functional group of carboxylic acid is COOH , so the suffix "oic acid" should be used.

So the IUPAC name of CH3COOH is Ethanoic acid.

Acetic acid is the common name of ethanoic acid.

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