(1) Some solids diffuse in liquids but not in gasses.
(2) We take sugar and add it to water it will diffuse in it. But if we keep it in air it won’t diffuse.
(3) Here diffusion is not going in solids when we keep in air because, the particles in a solid can only vibrate on the spot, rather than being able to move from place to place.
(4) Some solids diffuse in gasses because they are sublimators. They won’t dissolves in liquids.
