5. The angle of contact at the interface of water-glass is 0 ∘ , ethyl alcohol-glass is 0 ∘ , mercury-glass is 14 0 ∘ and methyliodide-glass is 3 0 ∘ . Aglass 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

Question

5. The angle of contact at the interface of water-glass is 0 ∘ , ethyl alcohol-glass is 0 ∘ , mercury-glass is 14 0 ∘ and methyliodide-glass is 3 0 ∘ . Aglass 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, water, ethylalcohol, mercury, methyliodide

MARKS App · Accepted Answer

We observed that meniscus of liquid is convex shape as shown in figure which is possible if only, the angle of contact is obtuse. Hence, the combination will be of case of mercury-glass ( 14 0 ∘ ) . Hence verifies the option (c).

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