"The shape of water meniscus is concave, whereas the shape of mercury menisscus is convex" Why?

Water meniscus in a glass tube is concave while that of mercury is convex. Why ?

The shape of water molecule is same as that of

What is the shape of a water molecule ?

A nail sinks in water whereas it floats on mercury.

"The angle of contact of mercury with glass is obtus, while the water with glass is acute." Why?

Assertion:A convex lens and a concave lens are kept in contact. They will behave as a diverging lens if focal length of convex lens is more. Reason: Power of a concave lens is always less than the power of a convex lens, as power of concave lens is negative whereas power of convex lens is positive.

Statement I: A needle placed carefully on the surface of water may float, whereas the ball of the same material will always sink. Statement II: The buoyancy of an object depends both on the material and shape of the object.

The angle of contact of a liquid in a capillary tube is 60^(@) . The shape of the meniscus is

Name the kind of meniscus formed (i) in case of water. (ii) in case of mercury.

The angle of contact at the interface of water glass is 0^(@) ethylalcohol-glass is 0^(@) mercury glass is 140^(@) and methyliodide-glass is 30^(@) A glass capillary is put in a through containing one of these four liquids. It is observed that the meniscus is convex. The liquid in the through is