A major component of Borsch reagent is obtained by reacting hydrazine hydrate with which of the following ?
A
B
C
D
JEE MAIN 2013, Difficult
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C
c The major component of Borsch reagent is $2,\,4\,-$ dinitrophenyl hydrazine which can be obtained by reaction of $2,\,4\, -$ dinitrochloro benzene and hydrazine
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Scheme $1$ and $2$ describe the conversion of $P$ to $Q$ and $R$ to $S$, respectively. Scheme $3$ describes the synthesis of $T$ from $Q$ and $S$. The total number of $Br$ atoms in a molecule of $T$ is. . . . . . . .
An amine on reaction with benzenesulphonyl chloride produces a compound insoluble in alkaline solution. This amine can be prepared by ammonolysis of ethyl chloride. The correct structure of amine is