Question
Physics Question on Viscosity
The main cause of viscosity is
A
Force of repulsion between molecules
B
Cohesive forces
C
adhesive forces
D
both cohesive and adhesive forces
Answer
Cohesive forces
Explanation
Solution
When the inter-molecular forces of attraction are strong within a liquid, there is a viscosity. Cohesive forces are attractive forces exist between molecules of the same substance. So, cohesive forces are the main cause of viscosity. Adhesive forces are attractive force between unlike molecules.