Question

why two or more mercury drops form a single drop when brought in contact with each other?​

Answer 1

Answer:

due to cohesion force

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Answer 2

Answer:

A spherical shape has the minimum surface area- to-volume ratio of all geometric forms. When two drops of a liquid are brought in contact, the cohesive forces between their molecules coalesces the drops into a single larger drop. This is because, the volume of the liquid remaining the same, the surface area of the resulting single drop is less than the combined surface area of the smaller drops. The resulting decrease in surface energy is released into the environment as heat.