Chemistry - STRUCTURAL ISOMERISM Question with Solution | TestHub
Which of the following statements are CORRECT ?
(I) A pair of functional group isomers belongs to different homologous series.
(II) A pair of functional group isomers has the same relative molecular mass.
(III) A pair of positional isomers differs in the position of substituents or functional groups on the carbon skeleton.
Options:
Answer:
Solution:
Explanation:
The question asks to identify the correct statements among the three given options concerning functional group isomers and positional isomers.
Concept :
Isomerism, Functional Group Isomers, Homologous Series, Molecular Mass, Positional Isomers
Functional group isomers have the same molecular formula but different functional groups.Each
functional group defines its own homologous series.
Statement I is CORRECT.
Since the molecular formula is the same, the total number of atoms of each element is identical, meaning
their relative molecular mass (or molecular weight) must also be the same.
Statement II is CORRECT.
A pair of positional isomers differs in the position of substituents or functional groups on the carbon
skeleton.
This statement describes positional isomerism
Statement III is CORRECT. Statements I, II, and III are all CORRECT.