Question

Which of the following is the IUPAC name for \(CH_3CH_2CH_2OH\)?

• A. Propan-1-ol
• B. Propan-2-ol
• C. Ethanol
• D. Methanol

Hint:

For naming alcohols, identify the longest carbon chain containing the -OH group and number it to give the hydroxyl group the lowest possible number.

Answer 1

The Correct Option is A

The compound \(CH_3CH_2CH_2OH\) has a three-carbon chain with a hydroxyl group (-OH) on the first carbon.
The steps for IUPAC naming are:

1. Identify the longest carbon chain: 3 carbons (propane).
2. Identify the functional group: -OH (alcohol, suffix -ol). 
3. Number the chain to give the -OH the lowest possible number: -OH is on carbon 1.

Thus, the IUPAC name is propan-1-ol. The name is: \[ {\text{propan-1-ol}} \] \bigskip