Question

Which of the following is NOT a pair of functional isomers?

• A. $C_2H_5OC_2H_5$ and $C_3H_7OCH_3$
• B. $CH_3CH_2OH$ and $CH_3OCH_3$
• C. $CH_3CH_2NO_2$ and $H_2NCH_2COOH$
• D. $CH_3COOH$ and $HCOOCH_3$

Answer 1

Answer: (A)

$C_2H_5OC_2H_5$ and $C_3H_7OCH_3$

Answer 2

Functional isomers are compounds having the same molecular formula but different functional groups. Both the compounds given in option c are ethers. $C _{2} H _{5} OC _{2} H _{5}$ and $C _{3} H _{7} OCH _{3}$ are metamers, while the rest of the options are examples of functional isomers.