Three liquids of densities ${\rho }_1,{\rho }_2 and {\rho }_3$ (with ${\rho }_1,{\rho }_2 > {\rho }_3$), having the same value of surface tension T, rise to the same height in three identical capillaries. The angles of contact${\theta }_1,{\theta }_2 and {\theta }_3$ obey

The height of liquid raised in a capillary is given by $\mathrm{h}=\frac{2\mathrm{Tcos}\theta }{\mathrm{r}\rho \mathrm{g}}$
where T is surface tension, $\theta$ is angle of contact, r is radius, $\rho$ is density.
$\text{Given}h\text{for}{\rho }_1,{\rho }_2,{\rho }_3\text{are equal}$
$(\text{where}{\rho }_1>{\rho }_2>{\rho }_3)$
$\therefore T is also same$
$\cos \theta \propto \rho$
$\therefore \text{for}\theta \in (0,\frac{\pi }{2})$
${\theta }_1<{\theta }_2<{\theta }_3$