Q.Nitrobenzene is reduced with $\text{Zn}$ dust and aqueous $\text{NH}_4\text{Cl}$ (a neutral, mild reducing medium). Identify the product formed and explain why this reagent combination stops the reduction at an intermediate stage rather than going all the way to aniline.

$\text{Zn}$ dust in neutral aqueous $\text{NH}_4\text{Cl}$ is a deliberately mild reducing medium: it supplies enough reducing power to take nitrobenzene through the nitroso stage to the hydroxylamine, $\text{C}_6\text{H}_5\text{NHOH}$, but the near-neutral pH is not strong enough to complete the final two-electron step through to the fully reduced amine. This makes $\text{Zn}/\text{NH}_4\text{Cl}$ the reagent of choice specifically when the partially-reduced hydroxylamine is the target, rather than aniline.

Recognise that mild, neutral reducing conditions stop reduction at an intermediate oxidation level rather than completing it.

Assuming every metal/acid-type reduction of a nitro compound automatically gives the amine -- the medium's strength and pH matter, not just the metal.