Question

Column I: Compounds
Column II: Isomers

Answer 1

(A) The compounds are chain isomers or skeletal isomers.
In chain isomerism or skeletal isomerism, components of the (usually carbon) skeleton are distinctly re-ordered to create different structures.
(B) The compounds are metamers.
Metamer is a compound that contains the same number and type of atoms as other compounds but with a different distribution of radicals.
(C) The compounds are functional isomers. One is acid and the other is ester.
Functional isomers are structural isomers that have the same molecular formula (that is, the same number of atoms of the same elements), but the atoms are connected in different ways so that the groupings are dissimilar.
(D) The compounds are position isomers.
In position isomerism (regioisomerism) a functional group or other substituent changes position on a parent structure.
(E) The compounds are ring chain isomers. One is alkene (an open chain molecule) and the other is cycloalkane. They are also functional isomers.