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:

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

1. water rises upto the tip of capillary tube and then starts overflowing like a fountain
 

2. water rises upto the top of capillary tube and stays there without overflowing
 

3. water rises upto a point a little below the top and stays there
 

4. water does not rise at all
 

A liquid does not wet the sides of a solid if the angle of contact is

1. Zero                                     

2. Obtuse (More than 90°)

3. Acute (Less than 90°)           

4. 90°

The meniscus of mercury in the capillary tube is

1. Convex           

2. Concave

3. Plane               

4. Uncertain

The liquid meniscus in the capillary tube will be convex if the angle of contact is

1. Greater than 90°

2. Less than 90°

3. Equal to 90°

4. Equal to 0°