Question

Nitrobenzene and hydrogen in presence of zinc combines to form :
(a) azobenzene
(b) benzene
(c) azoxybenzene
(d) aniline

Answer 1

Answer:

The correct option is (d) aniline.

Explanation:

• Nitrobenzene and hydrogen in presence of zinc combine to form aniline.
• An amino functional group is substituted for one of the benzene hydrogens in aniline, a primary arylamine.
• Numerous items, including polyurethane foam, agricultural chemicals, artificial colors, antioxidants, stabilizers for the rubber sector, herbicides, varnishes, and explosives, are made from aniline.
• It belongs to the class of anilines and is a primary arylamine.
• The reaction is as follows:-

          $C_{6}H_{5}NO_{2}$ + 6H → $C_{6}H_{5}NH_{2}$ + $2H_{2}O$

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Answer 2

Answer:

Nitrobenzene and hydrogen in presence of zinc combine to form (d) aniline.

Explanation:

• When nitrobenzene is reacted with hydrogen in the presence of zinc and hydrochloric acid, the products formed are aniline and water molecule.
• The O₂ molecule from the nitro group is replaced by 2 hydrogen molecules.
• The displaced O₂ molecule combines with other hydrogen molecules and forms H₂O.
• The general reaction is nitrobenzene + hydrogen → aniline + water

The complete reaction is written as follows:

C₆H₅NO₂ + 6[H] (in presence of Zn-HCl) → C₆H₅NH₂ + 2H₂O

Hence, when nitrobenzene and hydrogen combine in the presence of zinc, aniline is formed.

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