Question

Which one of the following pairs of compounds are functional isomers?

• A. $C{H}_{3}C{H}_{2}C{H}_{2}OH,C{H}_{3}CH\left(OH\right)C{H}_3$
• B. $C{H}_{3}C{H}_{2}C{H}_{2}OH,(C{H}_3{)}_{2}CHC{H}_{2}OH$
• C. $C{H}_{3}C{H}_{2}C{H}_{2}OH,C{H}_{3}C{H}_{2}C{H}_{2}Cl$
• D. $C{H}_{3}C{H}_{2}C{H}_{2}OH,C{H}_{3}OC{H}_{2}C{H}_3$

Answer 1

The correct option is D $C{H}_{3}C{H}_{2}C{H}_{2}OH,C{H}_{3}OC{H}_{2}C{H}_3$

The functional isomers are isomers with different functional groups, but same molecular formula.

A) The same functional group $-OH$.

B) The same functional group $-OH$. (Different molecular formula)

C)The different functional group $-OH$. (different molecular formula)

D) $C{H}_{3}C{H}_{2}C{H}_2-OH$ and $C{H}_3-O-C{H}_{2}C{H}_3$.

Different functional groups - one is alcohol and the other is ether. same molecular formula also.

So, they are functional isomers.
Option D is correct.