Which reagent converts nitrobenzene mainly into azobenzene?

A $LiAlH X_{4}$ in ether
B $Sn / HCl$
C $Zn / NH X_{4} Cl$
D $H X_{2}$ / Ni

Answer: A

Lithium aluminium hydride reduces aromatic nitro compounds to azo compounds, giving azobenzene from nitrobenzene. Sn/HCl and H2/Ni give aniline, and Zn/NH4Cl gives phenylhydroxylamine.

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Which reagent converts nitrobenzene mainly into azobenzene?

Answer: A

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