Question

In which of the following compounds -OH is the functional group

• A. Propane
• B. Propanal
• C. propanol
• D. propanone

Answer 1

The correct option is C

propanol

A functional group is defined as a group of atoms that present in a molecule and describes the characteristics reactions of organic compounds is called a functional group.

The explanation for the correct option:

Alcohol is an organic compound that contains the $(\mathrm{R}-\mathrm{OH})$ functional group.

In alcohol, the hydroxy $(-\mathrm{OH})$ group is the functional group.

In the IUPAC nomenclature, -ol is used in the case of alcohols.

In Propanol $\left({\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{OH}\right)$ the functional group is $(-\mathrm{OH})$, the hydroxy group.

The explanation for the incorrect option:

Propane $\left({\mathrm{C}}_3{\mathrm{H}}_8\right)$ is a saturated hydrocarbon because it contains the -ane suffix.

Propanal $\left({\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CHO}\right)$ is an aldehyde because it contains $(-\mathrm{CHO})$ functional group.

Propanone $\left({\mathrm{CH}}_3{\mathrm{COCH}}_3\right)$ is a ketone because it contains $(-\mathrm{COR})$ functional group.

Final answer:

Hence, option (C) is the correct option.