state formation of meniscus in liquids contained in narrow vessels
Answers
Explanation:
Formation of a Meniscus
When liquid water is confined in a tube, its surface (meniscus) has a concave shape because water wets the surface and creeps up the side. Mercury does not wet glass - the cohesive forces within the drops are stronger than the adhesive forces between the drops and glass.
Normally, a liquid contained in a vessel should have flat expose surface. however it is observed that when a liquid is poured in a test tube then it's expose surface is curved either inward or outward
the formation of curved surface by the expose surface of a liquid contained in a narrow vessel is called meniscus.
It has been observed that in the case of mercury a convex meniscus formed.
In the case of liquid(water, alcohol, etc..) concave meniscus is formed.