Question

Diffusion of gases is mainly due to:-

• A. Newton's Law of cooling
• B. Pressure difference
• C. Joule-Kelvin effect
• D. A concentration gradient of the molecules.

Answer 1

The correct option is D A concentration gradient of the molecules.

Diffusion means spreading out and intermixing of particles from one substance to another substances.

Diffusion occurs in Solids, liquids and gases.

Diffusion occurs due to movement of particles from a region of higher concentration region to a region of lower concentration till uniform distribution is attained.

Hence diffusion is referred as movement of particles due to concentration gradient