Identify $Z$ in the following reaction:

$A$ primary amine,$RNH_2$ can be reacted with $CH_3-X$ to get a secondary amine,$RNHCH_3$,but the disadvantage is that $3^o$ amine and quaternary ammonium salts are also obtained as side products. Can you suggest a method where $RNH_2$ forms only $2^o$ amine?

Identify compound $X$ in the following reaction.

Amongst the following,the most basic compound is:

Predict the major product $P$ in the following reaction.

Which of the following compounds is obtained when acetamide is warmed with bromine and excess conc. $KOH_{(aq)}$ solution?