The major product $(B)$ in this reaction is:

The correct order of decreasing basic strengths of $x$ (piperidine),$y$ (caprolactam derivative),and $z$ ($3$,$4$,$5$,$6$-tetrahydropyridine) is:

Given below are two statements:
Statement $I$: Benzenediazonium salt is prepared by the reaction of aniline with nitrous acid at $273-278 \ K$. It decomposes easily in the dry state.
Statement $II$: Insertion of iodine into the benzene ring is difficult and hence iodobenzene is prepared through the reaction of benzenediazonium salt with $KI$. In the light of the above statements,choose the most appropriate answer from the options given below:

The increasing order of $pK_b$ values of the following compounds is

Aniline is purified by which of the following methods?

Identify the major product $(G)$ in the following reaction: