Which of the following compounds 'will undergo additional reaction?

Explanation

Ethyne (C₂H₂) is the correct answer because it will undergo addition reactions, while the other options will not. Ethyne is an alkyne, which is a hydrocarbon containing a carbon-carbon triple bond. Alkynes can participate in addition reactions due to the presence of the triple bond, which can break and form new bonds with other atoms or molecules.

Butane (C₄H₁₀) and Pentane (C₅H₁₂) are both alkanes, a type of hydrocarbon with only single bonds between carbon atoms. Alkanes generally do not undergo addition reactions because they have no reactive sites, like double or triple bonds, in their structure.

Ethanol (C₂H₅OH) is an alcohol, which means it contains an -OH group. Alcohols are less likely to undergo addition reactions because the hydroxyl group is not as reactive as the carbon-carbon double or triple bonds found in alkenes or alkynes.

Tetrachloromethane (CCl₄) is a compound with a carbon atom surrounded by four chlorine atoms. It does not have any reactive sites, like double or triple bonds, which would allow it to undergo addition reactions.

In summary, ethyne is the compound that will undergo addition reactions, due to the presence of a carbon-carbon triple bond, while the other compounds do not have the necessary reactive sites to participate in these types of reactions.