Which of the following compounds contains a functional group with two oxygen atoms?

• A. $\text{Acetone}$
• B. $\text{Ethanol}$
• C. $\text{Ethyl acetate}$
• D. $\text{Aniline}$

Answer: (C)

Verified step by step guidance

1. Identify the functional groups present in each compound: Acetone contains a ketone group (C=O), Ethanol contains an alcohol group (-OH), Ethyl acetate contains an ester group (R-COO-R'), and Aniline contains an amine group (-NH2).
2. Recall that a functional group with two oxygen atoms typically involves both a carbonyl oxygen (C=O) and an ether-like oxygen (C-O), such as in esters or carboxylic acids.
3. Examine the structure of ethyl acetate, which is an ester. Esters have the general formula R-COO-R', where the carbonyl carbon is bonded to one oxygen via a double bond and to another oxygen via a single bond connected to an alkyl group.
4. Confirm that acetone has only one oxygen atom in its ketone group, ethanol has one oxygen in the hydroxyl group, and aniline has no oxygen atoms in its amine group.
5. Conclude that ethyl acetate is the compound containing a functional group with two oxygen atoms, specifically the ester functional group.