Geomerical isomers are :-
(1) Diastereomers
(2) Enantiomers
(3) Identical
(4) Structural isomer

Isomerism : 1) tautomerism,2) counting OF structural isomers

Hexane has four structural isomers.

State the relationship between each of the following five (5) pairs of structures (identical, enantiomers, diastereomers, structural isomers, different compounds that are not isomeric)

Give the name and structure of the lowest molecular mass cumulative polyene that shows only geometrical isomeris ( diastereomers ) and not optical isomers.

Give the name and structrues of six C atom cyclic diene with lowest molecular mass that shows only geometrical isomers (diastereomers) and not optical isomers.

Structural Isomerism ( Chain, Position isomers)

Given structures are (A) resonating structures (B) tautomers (C) geometrical isomers (D) optical isomers