Question

Ethylamine is soluble in water whereas aniline is not

Answer 1

$\huge\textcolor{green}{\texttt{Answer :-}}$

Ethylamine dissolves in water(soluble) due to intermolecular hydrogen bonding.

However, because of large hydrophobic part (i.e., hydrocarbon part) of aniline, the extent of hydrogen bonding is less and therefore, aniline is insoluble in water.