Benzene diazonium chloride on reaction with aniline in a mild alkaline medium forms:

$A$ student performed an analysis of an aliphatic organic compound '$X$' which, upon analysis, gave $C=61.01\%$, $H=15.25\%$, $N=23.74\%$. This compound, on treatment with $HNO_2/H_2O$, produced another compound '$Y$' which did not contain any nitrogen atom. However, the compound '$Y$' upon controlled oxidation produced another compound '$Z$' that responded to the iodoform test. The structure of '$X$' is:

$X$ and $Y$ (major products) in the following reaction sequence are:

$C_6H_5NH_2 \xrightarrow{H_2SO_4, 180^{\circ}C} H_2NC_6H_4(SO_3H)$ (para). Which statement is correct for the product?

Which one of the following compounds forms a quaternary salt on reacting with excess methyl iodide?

Pyridine is less basic than triethylamine because