Question

Mercury in a test tube forms ______ meniscus

• A. concave
• B. convex
• C. no
• D. cant say

Answer 1

The correct option is B convex

Answer: $convex$
Mercury in a test tube forms $convex$ meniscus.
The $cohesiveforce$ between the molecules of the material i.e $mercury$ is higher than the $adhesiveforce.$
The molecules tend to bind each other tightly hence the force in the test tube is inwards due to the surface tension.