Question

Choose the correct statment(s) for the following compounds :

• A. (a) , (b) and (d) are functional isomers.
• B. (a) and (c) are positional isomers.
• C. (b) and (d) are functional isomers
• D. (a) and (c) are functional isomers.

Answer 1

Answer: (C), (D)

(a) and (c) are functional isomers.

Structural isomers which shows a difference in the functional groups present in the carbon chain are functional isomers.
(a) and (c) are not positional isomers the functional group is different in both. (a) and (c) are functional isomers.

In (a) and (c) , the functional groups are alcohol and ether respectively, and both have same molecular formula $C_4{H}_{10}O$.
In (b) and (d) , the functional groups present are phenol and alcohol respectively. Both have same molecular formula $C_8{H}_{10}O$. (b) and (d) are functional isomers