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The angle of contact at the interface of...

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

A

water

B

ethylalcohol

C

mercury

D

methyliodide

Text Solution

Verified by Experts

The correct Answer is:
C
The meniscus of liquid in a capillary tube will be convex upwards if angle of contact is obtuse. It is so when one end of glass capillary tube is immersed in a trough of mercury.
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