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In which of the following compounds, — OH is the functional group?- Butanone
- Butanol
- Butanoic acid
- Butanal
Correct Answer: (b) Butanol
Explanation: The general formula of alcohols is CnH2n+1— OH.
For butanol, n = 4. So, formula is
C4H9—OH or
CH3—CH2—CH2—CH2—OH 
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