Question

What do you understand by the term meniscus? Name the type of meniscus formed in case

of: i. Mercury in a glass test tube ii. Water in a glass test tube..​

Answer 1

Answer:

A concave meniscus occurs when the particles of the liquid are more strongly attracted to the container (adhesion) than to each other (cohesion), causing the liquid to climb the walls of the container. This occurs between water and glass. Water-based fluids like sap, honey, and milk also have a concave meniscus in glass or other wettable containers.

Conversely, a convex meniscus occurs when the particles in the liquid have a stronger attraction to each other than to the material of the container.[1] Convex menisci occur, for example, between mercury and glass in barometers[1] and thermometers.

Answer 2

Answer:

The formation of curved surface by the exposed surface of a liquid contained in a narrow vessel is called meniscus.

(i) convex meniscus, (ii) concave meniscus