In carbyl amine reaction,the electrophile is:

The major product formed in the following reaction is:

Aniline,when diazotized in cold and then treated with $N,N$-dimethylaniline,gives a coloured product. Its structure would be:

The major product in the following reaction is:

With which of the following compounds does aniline react to form a Schiff base?

What is the final product $C$ in the reaction sequence: $CH_3CH_2NH_2$ $\xrightarrow{HNO_2} A$ $\xrightarrow{PCl_5} B$ $\xrightarrow{NH_3} C$?