The correct order of decreasing basic strength of the given amines is: Answer (1) Sol. Lower is the value of $\mathrm{pK}_{\mathrm{b}}$, higher is the basicity Also aliphatic amines are stronger bases than aromatic amines. $\mathrm{pK}_{\mathrm{b}}$ : Benzenamine > N-Methylaniline > Ethanamine > N-Ethylethanamine Basic strength : N-Ethylethanamine > Ethanamine > N-Methylaniline > Benzenamine
Given below are two statements :
Statement-I : Benzenediazonium salt is prepared by the reaction of aniline with nitrous acid at $273-278 \mathrm{~K}$. 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 major product X formed in the following reaction sequence is :
The compound that does not undergo Friedel-Crafts alkylation reaction but gives a positive carbylamine test is :