question_answer 1)

  Note : Consider structures I to VII and answer the questions 23-26. \[I.\]\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-OH\] \[\text{II}\text{.}\]\[C{{H}_{3}}-C{{H}_{2}}-\underset{\underset{\text{OH}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{CH}}\,-C{{H}_{3}}\] \[\text{III}\text{.}\]\[C{{H}_{3}}-\underset{\underset{\text{OH}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\overset{\overset{\text{C}{{\text{H}}_{\text{3}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{C}}}\,-C{{H}_{3}}\] \[\text{IV}\text{.}\]\[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{2}}-OH\] \[\text{V}\text{.}\]\[C{{H}_{3}}-C{{H}_{2}}-O-C{{H}_{2}}-C{{H}_{3}}\] \[\text{VI}\text{.}\]\[C{{H}_{3}}-O-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\] \[\text{VII}\text{.}\]\[C{{H}_{3}}-O-\underset{\underset{\text{C}{{\text{H}}_{\text{3}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{CH}}\,-C{{H}_{3}}\]   Which of the above compounds form pairs of metamers?

Answer:

  V and VI or V and VII forms a pair of metamers since they differ in the number of carbon atoms about the functional group, -O-atom on either side.