List of top Chemistry Questions on Aromatic Substitution Reactions asked in TS EAMCET

\[ \mathrm{C_6H_5NH_2} \xrightarrow[\;273{-}278\,K\;]{\mathrm{HNO_2/HCl}} X \xrightarrow{\mathrm{Cu_2Cl_2}} Y \] Conversion of \(X\) to \(Y\) is called

The compound that is most reactive towards electrophilic nitration is

What are \(X,\;Y,\;Z\) respectively in the following reaction sequence?