What compound is formed when hydrogen gas is passed through nitrobenzene in the presence of finely divided nickel?

Aniline

The correct answer is option 2. Aniline.

When hydrogen gas is passed through nitrobenzene in the presence of finely divided nickel, the reaction that occurs is a catalytic hydrogenation. The nitro group \((-NO_2)\) in nitrobenzene \((C_6H_5NO_2)\) is reduced to an amino group \((-NH_2)\), resulting in the formation of aniline \((C_6H_5NH

In this process:

Nitrobenzene \((C_6H_5NO_2)\) is the starting material. Hydrogen gas \((H_2)\) is the reducing agent. Nickel (Ni) acts as the catalyst. Aniline \((C_6H_5NH_2)\) is the final product.

The reaction can be summarized as follows:

Therefore, the compound formed when hydrogen gas is passed through nitrobenzene in the presence of finely divided nickel is Aniline.