The colour of $p$-amino azobenzene is

$A$ mixture containing the following four compounds is extracted with $1 \, M \, HCl$. The compound that goes to the aqueous layer is:
$(I)$ Cyclohexyl methyl sulfide
$(II)$ $N$-methylcyclohexylamine
$(III)$ Methoxycyclohexane
$(IV)$ Cyclohexyl methyl ketone

Nitrobenzene on reduction by zinc and $NH_4Cl$ gives

Which of the following amines is most basic in nature in the aqueous phase?

The most basic compound among the following is:

Benzamide reacts with $Br_2$ and $KOH$ gives :-