In the options given below, the wrong ‘molecular formula – IUPAC’ Name – Identify the common name option. A. C4H9OH – Butanol – Butyl alcohol B. C2H5OH – Ethanol – Ethyl alcohol C. C3H7OH – Propanol – Propyl alcohol D. C2H3OH – Methanol – Methyl alcohol

The correct answer is D.

The molecular formula of methanol is $CH_3OH$, while its IUPAC name is methyl alcohol. Its common name is wood alcohol.

The molecular formula of ethanol is $C_2H_5OH$, while its IUPAC name is ethyl alcohol. Its common name is grain alcohol or drinking alcohol.

The molecular formula of propanone is $C_3H_6O$, while its IUPAC name is propanone. Its common name is acetone.

The molecular formula of butanol is $C_4H_9OH$, while its IUPAC name is butanol. Its common name is butyl alcohol.

Methanol is the only option that does not have a common name that is consistent with its IUPAC name.