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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 trough containing one of these four liquids . It is observed that the meniscus is convex.the liquid in the trough is

A

water

B

ethylacohal

C

mercury

D

methyliodide

Text Solution

Verified by Experts

The correct Answer is:
c

If angle of contact `thetagt90^(@)` ,then meniscus will be convex .Hence liquid of `theta=140^(@)` is mercury.
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