Reduction of nitroalkanes yields

Explain the reaction of diazotization with suitable examples.

Identify product $B$ in the following reaction:
Acetanilide $\xrightarrow[conc. H_2SO_4]{conc. HNO_3}$ $A$ $\xrightarrow{H^+ \text{ or } OH^-}$ $B$

What is obtained by the reduction of acetaldoxime?

$A$ $\xrightarrow[{CHCl_3}]{{KOH}} B$ $\xrightarrow[{H^\oplus}]{{LiAlH_4}} CH_3CH_2NHCH_3$
Identify compound $A$.

Starting from propanoic acid,the following reactions were carried out: $CH_3-CH_2-COOH$ $\xrightarrow{SOCl_2} [X]$ $\xrightarrow[\Delta]{NH_3} [Y]$ $\xrightarrow[KOH]{Br_2} [Z]$. Product $[Z]$ will be?