Question

Select the incorrect statement from the following option.

(a) In case of mercury and glass, we observe a convex meniscus

(b) Surface tension is responsible for the rise and fall of the capillary tubes

(c) If two drops encounter each other, they tend to repel each other

(d) All of the mentioned

The question was asked in an interview for job.

My question is taken from Surface Tension topic in division Methods of Purification of Engineering Chemistry I

Answer 1

Right choice is (c) If two drops encounter each other, they tend to repel each other

The best I can explain: If two drops encounter each other, they tend to coalesce into a large drop. All the other options are correct. In the case of mercury and glass, we observe a convex meniscus and Surface tension is responsible for the rise and fall of the capillary tubes.