The reaction of ethylamine and acetic anhydride leads to the formation of:

In the following sequence $CH_3CH_2Cl$ $\xrightarrow{NaCN} (i)$ $\xrightarrow{Ni/H_2} (ii)$ $\xrightarrow{\text{acetic anhydride}} (iii)$,Product $(iii)$ is

Identify the major product of the following reaction:

How many secondary amines are possible with the molecular formula $C_4H_{11}N$?

The reaction sequence is given as follows:
$CH_3-CO-CH_2-CH_2-CO-CH_3$ $\xrightarrow[(NH_4)_2CO_3]{\Delta} (A)$ $\xrightarrow[CCl_3CO_2Na]{\Delta} (B)$
Product $(B)$ of the above reaction is:

$m$-Bromotoluene is prepared by :