Geometric isomers have the same connectivity but differ in the spatial arrangement of groups around a double bond.

Optical isomers differ in their ability to rotate plane-polarized light.

Geometric isomers arise due to restricted rotation around double bonds.

1-butanol and 2-butanol differ in the position of the hydroxyl group, hence they are structural isomers.

Cis-2-butene and trans-2-butene differ in the spatial arrangement of groups around the double bond, which is characteristic of geometric isomerism.

1,2-dichloroethane can exist in different structural forms, thus showing structural isomerism.

1-butanol and 2-butanol differ in the position of the hydroxyl group, hence they are structural isomers.

Structural isomerism occurs when compounds have the same molecular formula but different arrangements of atoms.

C4H8 can exhibit both structural isomerism (different structures) and geometric isomerism (cis/trans forms).

Butan-2-one does not have a chiral center and therefore does not exhibit optical isomerism.

2-butanol has a chiral center and can exist as two enantiomers, thus exhibiting optical isomerism.

2-hexene can exist in cis and trans forms due to the presence of a double bond.

3-pentanol has a chiral center and can also have geometric isomers due to the presence of a double bond.

1,3-butadiene can have structural isomers and also exhibit geometric isomerism due to its double bonds.

Acetic acid can exist in two forms (keto and enol) and thus exhibits tautomeric isomerism.

2-hexene has a double bond and can have cis and trans configurations.

Acetic acid can exist in keto and enol forms, thus showing tautomeric isomerism.

Ethane does not have a double bond or any substituents that would allow for geometric isomerism.

C2H4 (ethylene) does not have enough carbon atoms to exhibit isomerism.

Butane does not have a chiral center and therefore does not exhibit optical isomerism.

Butane does not show optical isomerism as it does not have a chiral center.

2-butene has a double bond between the second and third carbon atoms, allowing for cis and trans isomers.

C2H6 (ethane) and C2H4 (ethylene) have different molecular structures, thus they are structural isomers.

Cis-2-butene has different spatial arrangements of groups around the double bond, making it a geometric isomer.

C4H10 can exist as butane and isobutane, which are structural isomers.

Cis-trans isomers have the same connectivity but differ in the spatial arrangement of groups around a double bond.

Geometric isomers have the same connectivity of atoms but differ in their spatial arrangement.

Optical isomers, or enantiomers, rotate plane-polarized light in opposite directions.

Structural isomers have different connectivity of atoms, leading to different compounds.

Acetaldehyde can exist in two forms (keto and enol) that readily interconvert, demonstrating tautomeric isomerism.