Question

The viscosity of a liquid molecule depends on:

• A. the volume of the liquid
• B. the temperature of the liquid
• C. the surface area of the liquid
• D. the structure of the molecule

Answer 1

Answer: (B), (D)

The correct options are
B the temperature of the liquid
D the structure of the molecule

The viscosity of a liquid molecule depends on the temperature of the liquid and the structure of the molecule. It is independent of the volume of the liquid and the surface area of the liquid.
Note: Increase in temperature decreases the inter-molecular forces which leads to lower viscosity. With increase in branch in the chain, viscosity increases. Symmetrical molecules have lower viscosity. Viscosity also depends on inter-molecular forces, molecular mass and pressure.