Why is low density liquid used in a manometric liquid in a physics laboratory ?

Why is a low density liquid used as a manometric liquid in a physics laboratory!

The Zurin's law for a liquid is

The rise of a liquid in a capillary is due to

What is Boiling point of liquid?

why are liquids and gases categorised as fuids ?

When the adhesive force between a liquid and glass is greater than the force between the liquid molecules, the meniscus of the liquid in a capillary tube is

Weight of the liquid column is given by

Two immiscible liquids are separated by

When a capillary tube stands in water, water rises to a certain height in the tube. A similar experiment is done using another liquid and it is found that the liquid rises more than water. This difference might be due to

When the velcity of flow of liquid is greater than critial velocity, the liquid is said to have