Identify the end product (Z) in the sequence of the following reactions:
The sequence of reactions starts with a base-promoted elimination, followed by a rearrangement and a substitution to finally produce the ester \(O_2CCH_3\) as the end product.
Give plausible explanation for:
(a) Diazonium salts of aromatic amines are stable.
(b) Aniline does not undergo Friedel-Crafts reaction.
(c) Aniline on nitration gives substantial meta product.
The following graph indicates the system containing 1 mole of gas involving various steps. When it moves from Z to X, the type of undergoing process is: