IUPAC name of the compound given below is:

The correct answer is Option (3) → 2-Methoxypropane

In the IUPAC system an ether R–O–R′ is named as an alkoxyalkane: the larger alkyl group is the parent alkane, and the smaller –OR group is the alkoxy substituent.

In \( \ce{CH3-O-CH(CH3)2} \) the larger group is the three-carbon isopropyl group, so the parent is propane; the –\( \ce{OCH3} \) (methoxy) group is on its middle carbon:

    \( \overset{1}{\ce{CH3}}{-}\overset{2}{\ce{CH}}(\ce{OCH3}){-}\overset{3}{\ce{CH3}} \)

So the IUPAC name is 2-methoxypropane.