The complete combustion of propane produces carbon dioxide (CO2) and water (H2O).

The reaction between an alcohol and a carboxylic acid produces an ester through a process called esterification.

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.

Butanol can exist in different structural forms (1-butanol and 2-butanol), which is a case of structural isomerism.

Butanol and isobutanol are structural isomers as they have the same molecular formula but different structures.

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

The reaction of an alkene with water in the presence of an acid is called hydrolysis.

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.

Alcohols contain a hydroxyl (-OH) functional group.

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.

C4H10 is an alkane, which is a saturated hydrocarbon with single bonds only.

Benzene is a classic example of an aromatic compound due to its cyclic structure and delocalized pi electrons.

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.