Capillary Rise

The wettability of a surface by a liquid depends primarily on:

1.	surface tension.
2.	density.
3.	angle of contact between the surface and the liquid.
4.	viscosity.

Water rises to height ' ' in a capillary tube. If the length of capillary tube above the surface of the water is made less than , then:

1.	water does not rise at all.
2.	water rises up to the tip of capillary tube and then starts overflowing like a fountain.
3.	water rises up to the top of capillary tube and stays there without overflowing.
4.	water rises up to a point a little below the top and stays there.

Three liquids of densities and having the same value of the surface tension rise to the same height in three identical capillaries. The angles of contact $\mathrm{}$ and $\mathrm{}$ obey:
1.
2.
3.
4.

A liquid does not wet the solid surface if the angle of contact is:
1. equal to $\mathrm{}$
2. equal to $\mathrm{}$
3. greater then $\mathrm{}$
4. zero