Organic Functional Groups Quiz

Which of the following is the general formula for an alcohol?

Answer explanation

The general formula for an alcohol is represented by R-OH, where R is a hydrocarbon group attached to the hydroxyl functional group.

What is the functional group of aldehydes?

Answer explanation

The functional group of aldehydes is -CHO, which consists of a carbonyl group attached to a hydrogen atom.

Which of the following compounds is a ketone?

• Methanol

• Propanone

• Ethanoic acid

• Ethyl ethanoate

Answer explanation

Propanone is a ketone because it has a carbonyl group (C=O) attached to two alkyl groups. Methanol, Ethanoic acid, and Ethyl ethanoate are not ketones.

• Methanoic acid

• Ethanoic acid

• Propanoic acid

• Butanoic acid

Answer explanation

The IUPAC name for the compound with the formula CH3COOH is Ethanoic acid.

Which of the following is an ester?

Answer explanation

The correct choice is CH3COOCH3 because it is an ester, which is a compound formed by the reaction between an alcohol and a carboxylic acid.

What is the functional group of amines?

Answer explanation

The functional group of amines is -NH2, which consists of a nitrogen atom bonded to two hydrogen atoms. This group is characteristic of amine compounds.

Which of the following is an amide?

Answer explanation

The correct choice is CH3CONH2 because it is an amide functional group with the structure RCONH2, where R is an alkyl group.

What is the general formula for ethers?

Answer explanation

The general formula for ethers is represented as R-O-R', where R and R' are alkyl or aryl groups attached to an oxygen atom.

• Propanal

• Propanone

• Propanoic acid

• Propanol

Answer explanation

The IUPAC name for CH3CH2CHO is Propanal, as it is an aldehyde with a chain of three carbon atoms and a terminal aldehyde functional group.

What is the functional group of carboxylic acids?

Answer explanation

The functional group of carboxylic acids is -COOH, which consists of a carbonyl group (-CO) and a hydroxyl group (-OH) attached to the same carbon atom.