C4H10 is an alkane and is named butane, as it contains only single bonds.

The longest chain has 4 carbons with a methyl group on the second carbon, making it 2-methylbutane.

The longest carbon chain contains 5 carbons with a double bond at the first carbon, making it 1-pentene.

The reaction of propene with bromine results in the formation of 1,2-dibromopropane through an addition reaction.

The reaction of ethene with water in the presence of an acid catalyst leads to the formation of ethanol through hydration.

The reaction of 1-pentene with HBr is an addition reaction, where HBr adds across the double bond.

The reaction of an alkene with bromine is a halogenation reaction, where bromine adds across the double bond.

Alkenes are characterized by the presence of a carbon-carbon double bond, which is the alkene functional group.

Cyclopentene is a cyclic compound that contains a double bond, making it a cyclic alkene.

The hydrogenation of an alkene involves the addition of hydrogen across the double bond, which is an electrophilic addition mechanism.

1-heptyne has a triple bond between the first and second carbons, represented as CH3-CH2-CH2-CH2-CH2-C≡C-H.

3-methyl-1-butyne has a triple bond at the first carbon and a methyl group on the third carbon.