alleryWhat is the IUPAC name of the alcohol CH₃–CH₂–CH₂–OH?
APropanal
BPropan-1-ol
CEthanol
DPropan-2-ol
Answer & Solution
Correct answer: B. Propan-1-ol
1. The chain has three carbons, so the root word is Prop, ruling out Ethanol.
2. The –OH group makes it an alcohol with secondary suffix -ol, ruling out Propanal (an aldehyde).
3. Numbering from the end nearer the –OH puts it on carbon 1, so it is -1-ol, not -2-ol.
4. The terminal 'e' of 'ane' is dropped, giving Prop + an + 1-ol = Propan-1-ol.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 11 "Carbon and its Compounds", p.169_
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