Question

a scoop - shaped concave meniscus forms when adhesive forces between a liquid and its container are stronger than cohesive forces between the liquid molecules. but if cohesive forces are stronger than adhesive forces, a hump - shaped convex meniscus forms instead on the liquids surface.
the models show three different liquids in glass columns. there are cohesive forces between the molecules in each liquid, and there are adhesive forces between each liquid and the glass column. match the descriptions of adhesive and cohesive forces to each model.
adhesive forces are greater than cohesive forces.
cohesive forces are greater than adhesive forces.
adhesive and cohesive forces are equal.
oil
water
mercury

Explanation:

Water forms a concave meniscus as adhesive forces between water and glass are greater than cohesive forces between water molecules. Oil has a relatively flat surface as adhesive and cohesive forces are close to equal. Mercury forms a convex meniscus as cohesive forces between mercury atoms are greater than adhesive forces between mercury and glass.

Answer:

Oil: Adhesive and cohesive forces are equal.
Water: Adhesive forces are greater than cohesive forces.
Mercury: Cohesive forces are greater than adhesive forces.