Question

In which of the following compounds $-\mathrm{OH}$ is the functional group?

• A. Butanone
• B. Butanal
• C. Butanol
• D. Butanoic acid

Answer 1

The correct option is C

Butanol

Explanation for correct option:

Option (c) Butanol:

• In organic chemistry, a functional group is a collection of atoms inside molecules that bond together to respond in predictable ways.
• Alcohols are organic compounds, that are all made up of the functional group $-\mathrm{OH}$.
• This category possesses alcohol-like characteristics.
• Alcohols have names that finish in '-ol,' such as Ethanol and Butanol.
• Butanol has the chemical formula: ${\mathrm{CH}}_3{\left({\mathrm{CH}}_2\right)}_3\mathrm{OH}$

Explanation for incorrect options:

Option (a) Butanone:

• In Butanone, the functional group is $-\mathrm{C}=\mathrm{O}$, i.e., ketone.

• So, this option is incorrect.

Option (b) Butanal:

• In Butanal, the functional group is $-\mathrm{CHO}$, i.e., aldehyde.

• So, this option is incorrect.

Option (d) Butanoic acid:

• In Butanoic acid, the functional group is $-\mathrm{COOH}$, i.e., Carboxylic acid.

• So, this option is incorrect.

Hence, the correct option is (c) Butanol.