What is the baker called?

Explanation

Both aliphatic and aromatic nitro compounds on reduction in neutral medium, i.e, Zn dust and `NH_(4)Cl` solution, give the corresponding hydroxylamines.
`underset("Nitrobenzene")(C_(6)H_(5)NO_(2)) underset(Delta)overset(Zn//NH_(4)Cl,H_(2)O)to underset("Phenylhydroxylamine")(C_(6)H_(5)NHOH)`
these hydroxylamines when warmed with Tollens' reagent are easily oxidised to the corresponding nitroso compounds and thus reduce tollens' reagent to metallic silver
`C_(6)H_(5)NHOH+underset("Tollens' ragent")(2[Ag(NH_(3))_(2)]^(+))+2OH^(-)to underset("Nitrosobenzene")(C_(6)H_(5)N=O)+underset("Silver mirror")(2Agdarr)+4NH_(3)+2H_(2)O`
This reaction is called Baker Mulliken's test and is used as a test for detection of nitro group in organic compounds.