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