Perform the following transformations: ethane?ethane?ethine?benzene?benzene?nitrobenzene?aniline.

The transformation of ethane to ethine is an oxidation reaction, in which two hydrogen atoms are replaced by a double bond between the two carbon atoms, forming an unsaturated alkene. The reaction is catalyzed by an oxidizing agent, such as chromic acid, and requires an energy input.

The transformation of ethine to benzene is a dehydrogenation reaction, in which the double bond of the alkene is broken and the two carbon atoms become part of the aromatic ring. This reaction is catalyzed by an acid, such as sulfuric acid, and requires an energy input.

The transformation of benzene to nitrobenzene is a nitration reaction, in which an electron-withdrawing nitro group is added to the aromatic ring. This reaction is catalyzed by an acid, such as nitric acid, and requires an energy input.

Finally, the transformation of nitrobenzene to aniline is a reduction reaction, in which the nitro group is replaced by an amino group. This reaction is catalyzed by a reducing agent, such as hydrogen or sodium borohydride, and requires an energy input.