Which of the following compounds will undergo additional reactions?

Explanation

Ethyne, also known as acetylene, is the correct answer because it undergoes addition reactions due to the presence of a triple bond between the two carbon atoms. The triple bond in ethyne consists of one sigma bond and two pi bonds. In addition reactions, the pi bonds break and new atoms or groups of atoms are added to the carbon atoms, resulting in a more saturated compound.

On the other hand, butane and pentane are alkanes, which have only single bonds between the carbon atoms. Alkanes are saturated hydrocarbons, and they do not readily undergo addition reactions. Instead, they typically undergo substitution reactions.

Ethanol is an alcohol, meaning that it has a hydroxyl group (-OH) attached to a carbon atom. Alcohols mainly undergo substitution and elimination reactions, but not addition reactions.

Tetrachloromethane, also known as carbon tetrachloride, is a compound with four chlorine atoms bonded to a central carbon atom. This compound is already saturated and does not undergo addition reactions.

In summary, ethyne is the only compound among the given options that undergoes addition reactions due to the presence of the triple bond.