Question

Choose the correct answers from the alternatives given.
Which one of the following does not increase the rate of diffusion?

• A. Decreasing the size of the molecules
• B. Increasing the size of the molecules
• C. Increasing the temperature of the fluid
• D. Increasing the concentration of the molecule

Answer 1

The correct option is B Increasing the size of the molecules

Diffusion is the movement of molecules or ions from the region of their higher concentration to the region of their low concentration. Diffusion is obvious in gases and liquids but rare in solids. Diffusion rates are affected by the concentration gradient, the permeability of the membrane separating different molecules, temperature and pressure.

Hence, the correct answer is 'Increasing the size of the molecules'.