The reaction of benzylamine with nitrous acid $(HNO_2)$ produces product $A$. Identify product $A$.

State True or False for the following statements:
$(i)$ Aniline becomes polar in its resonance structure.
$(ii)$ The separation of charge occurs in the resonance structure of aniline.
$(iii)$ The $NH_2$ group of aniline is electron donating.
$(iv)$ The $NH_2$ group of aniline is electron attracting in resonance $(-R)$.

How many isomers of $C_4H_{11}N$ are secondary amines?

When chloroform reacts with ethyl amine in the presence of alcoholic $KOH$,the compound formed is

Electrophilic substitution of aniline with bromine in aqueous medium gives:

When benzene diazonium chloride is treated with $\beta-$naphthol in an alkaline medium,a coupling reaction takes place,resulting in the formation of an azo dye. In this reaction,benzene diazonium chloride acts as: