Water does not wet an oily glass because

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The force of attraction between the same molecules is called cohesive force,and the force of attraction between different molecules is called adhe

Vedclass · Accepted Answer

Cohesive force of water is greater than adhesive force between water and oil molecules

Vedclass · Answer

(D) The force of attraction between the same molecules is called cohesive force,and the force of attraction between different molecules is called adhesive force.When water comes into contact with an oily surface,it forms an obtuse angle of contact.This indicates that the cohesive force between water molecules is significantly stronger than the adhesive force between water molecules and oil molecules.Because the cohesive force dominates,the water molecules prefer to stick to each other rather than spreading over the oily surface,preventing the glass from getting wet.Therefore,the correct reason is that the cohesive force of water is greater than the adhesive force between water and oil molecules.

Similar Questions

Give reason why mercury does not wet glass.

$A$ drop of oil is placed on the surface of water. Which of the following statements is correct?

$A$ molecule of water on the surface experiences:

The spiders and insects move and run about on the surface of water without sinking because

What is the maximum distance up to which the molecules can exert an attractive force on each other?

Vedclass Test Series

Exam Paper Generator

Online Exam Module