Question

When the temperature is raised, the viscosity of the liquid decreases. This is because :

• A. Attraction between the molecules increases
• B. Covalent and hydrogen bond forces decreases
• C. Volume of the solution decreases
• D. Increase in temperature increases the average kinetic energy of the molecules, which overcomes the attractive forces between them

Answer 1

The correct option is D Increase in temperature increases the average kinetic energy of the molecules, which overcomes the attractive forces between them

When temperature of liquid increases, the average kinetic energy of molecules increases. As a result, the molecules overcomes the intermolecular attractive forces between them as a result of which viscosity of a solution decreases.