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What type of surface you would observe in the case of mercury with glass?

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What type of surface you would observe in the case of mercury with glass?

(a) Concave meniscus

(b) Convex meniscus

(c) Contact angle = 180°

(d) Contact angle = 0°

I got this question in an online quiz.

This is a very interesting question from Errors in Data and Calculations in portion Presentation and Analysis of Data of Bioprocess Engineering

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Right option is (b) Convex meniscus

Easiest explanation: A convex meniscus occurs when the molecules have a stronger attraction to each other than to the container and Mercury does not wet glass – the cohesive forces within the drops i.e., bond between the molecules of mercury are stronger than the adhesive forces between the drops and glass.

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