Identify the strongest base from the following.

The reaction of aniline with chloroform and alcoholic $KOH$ yields .....

Which of the following statements is true?
$1)$ Tertiary amines react with acid chlorides.
$2)$ $N$-ethylbenzene sulphonamide is soluble in alkali.
$3)$ $N,N$-diethylbenzene sulphonamide is soluble in alkali.
$4)$ Tertiary amines react with Hinsberg's reagent.

Yellow dye can be prepared by a coupling reaction of benzene diazonium chloride in acidic medium with $X$. Identify $X$ from the following.

Which of the following compounds reacts with aqueous nitrous acid at low temperature to give an oily substance,$N$-nitrosoamine?

For the reaction shown,which statement is correct for Product "$X$"?