What is diffusion pressure deficit ?explaination of this concept

Hi Sushmita,

Thank you for asking

Diffusion pressure deficit is the term used to describe the reduction in the ability of diffusion by the pure solvent due to presence of solute. Actually, this one is one of the colligative property of the solvent.

Confused ??

Ok well !
Now, lets think you are thirsty (extremely) and you just drank little water. The level of reduction in your thirst is like that of deficit in water requirement by you.

Hope I answered the question.