Question

Which the following is an example of an organic compound that contains an attached carbonyl group at the end of a carbon chain?

Answer 1

Most likely the organic compound that contains a carbonyl group bonded near to the end of the chain would be an aldehyde. Unlike a ketone where the carbonyl can be found anywhere within the chain, an aldehyde, is specifically found near the end of the compound, because it would be bonded to H as well.

Answer 2

Answer : The correct option is, Aldehyde.

Explanation :

Ketone group : It is the class of organic compound in which the $-CO$ group is attached to a hydrocarbon is known as ketone.

The general representation of ketone are, $R-CO-R'$.

For example : Acetone, $H_3C-CO-CH_3$

Aldehyde group : It is the class of organic compound in which the $-CHO$ group is attached to a hydrocarbon is known as aldehyde.

The general representation of aldehyde are, $R-CHO$.

For example : Ethanal , $H_3C-CH_2-CHO$

Ether group : It is the class of organic compound in which the oxygen is directly attached to the two alkyl group of carbon is known as ether.

The general representation of ether are, $R-O-R^'$.

For example : Dimethyl ether, $H_3C-O-CH_3$

Amine group : It is the class of organic compound in which the $-NH_2$ group is directly attached to the alkyl group of carbon is known as amine.

The general representation of amine are, $R-NH_2$.

For example : Ethylamine, $H_3C-CH_2-NH_2$

As per question, aldehyde is an example of an organic compound that contains an attached carbonyl group at the end of the carbon chain.

Hence, the correct option is, Aldehyde.