Question

the smell of hot sizzling food reach you at a distance ,but to get the smell of cold food you have to go near it

Answer 1

When food is hot, diffusion is more. But in cold food diffusion is slow. Hence to get the smell from cold food we have to go close.

Answer 2

Particles of cold food possess less kinetic energy and are not able to reach several meters away. ... At higher temperatures, particles have high kinetic energy and move faster hence, due to this smell of hot sizzling food reaches you several meters away, but to get the smell from cold food you have to go close........