Q.

The angle of contact at the interface of water-glass is 0°, Ethyl alcohol-glass is 0°, Mercury-glass is 140° and Methyl iodide- 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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a

Water

b

Mercury

c

Methyl iodide

d

Ethyl alcohol

answer is C.

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The angle of contact at the interface of water-glass is 0°, Ethyl alcohol-glass is 0°, Mercury-glass is 140° and Methyl iodide- 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