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Multiple Choice
What is the correct IUPAC name for the compound ?
A
Propanoic acid
B
Methanoic acid
C
Ethanoic acid
D
Butanoic acid
Verified step by step guidance
1
Identify the structure of the compound given: \(\mathrm{CH_3CH-COOH}\). This represents a carboxylic acid with a three-carbon chain.
Count the number of carbon atoms in the longest continuous chain that includes the carboxyl group (\(-COOH\)). Here, there are three carbons total.
Recall the IUPAC naming convention for carboxylic acids: the suffix '-oic acid' is added to the name of the corresponding alkane with the same number of carbons.
Determine the alkane name for a three-carbon chain, which is 'propane'. Replace the '-e' with '-oic acid' to name the acid, resulting in 'propanoic acid'.
Confirm that the carboxyl carbon is always carbon number 1 in the chain, so no additional numbering is needed in this case.