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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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