Which molecule is an alcohol among the following?

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Multiple Choice

Which molecule is an alcohol among the following?

Explanation:
Alcohols are molecules that contain a hydroxyl group (-OH) attached to a carbon atom. Among these formulas, the one with an -OH group is C4H9OH, which is butanol, an alcohol. The others show different functional groups or none at all: C2H5COOH and C3H7COOH have carboxyl groups (-COOH), identifying them as carboxylic acids; C4H8 is just a hydrocarbon with no -OH group. So the molecule with the hydroxyl group is the alcohol.

Alcohols are molecules that contain a hydroxyl group (-OH) attached to a carbon atom. Among these formulas, the one with an -OH group is C4H9OH, which is butanol, an alcohol. The others show different functional groups or none at all: C2H5COOH and C3H7COOH have carboxyl groups (-COOH), identifying them as carboxylic acids; C4H8 is just a hydrocarbon with no -OH group. So the molecule with the hydroxyl group is the alcohol.

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