Question

What is the structural formula of simplest ketone?

• A. \(CH_3 - O - CH_3\)
• B. \(CH_3 - NH_2\)
• C.
• D.

Answer 1

The Correct Option is C

A ketone is a functional group with the general formula R-CO-R', where R and R' are alkyl or aryl groups. The simplest ketone would have the smallest possible alkyl groups, which are methyl groups \((CH_3).\) 

Thus, the simplest ketone is acetone (propanone), with the structural formula \(CH_3-CO-CH_3\). 

(1) \(CH_3-O-CH_3 \)is dimethyl ether (an ether) 
(2) \(CH_3-NH_2 \)is methylamine (an amine) 
(3) \(CH_3-CO-CH_3 \)is propanone (acetone), the simplest ketone 
(4) \(CH_3-COOH\) (corrected to CH3-CO-OH here) would be acetic acid, but \(CH_3-C-OH \)in the way its written doesn't work 

Thus, the correct option is (3). Final Answer: The final answer is $\boxed{CH3—C—CH3}$