Question Detail
Question
What type of meniscus forms when the molecules of a liquid have a stronger attraction to each other (cohesion) than to the container material (adhesion)?
Correct Answer
Option A is the correct answer.
Detailed Explanation
Stronger cohesive forces cause the liquid to be more attracted to itself than to the walls. The liquid pulls away from the walls, forming a surface that is higher in the middle, which is a convex meniscus (e.g., mercury in a glass tube).
Hint
Think of mercury in a glass tube. It pulls away from the glass, curving upward in the center.