$$ \begin{aligned} &\text { The following two reactions give the same foul smelling product } Z \text {. }\\ &\mathrm{C}_2 \mathrm{H}_5 \mathrm{Cl} \xrightarrow{\mathrm{X}} \mathrm{Z} \end{aligned} $$

$X$ and $Z$, respectively, are :

$$ \text { Two products } X \text { and } Y \text { are formed in the following reaction sequence. } $$

The suitable method that can be used for the separation of products X and Y is :

The major product Z formed in the following sequence of reactions is

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