Give reasons for the following observation: The smell of hot sizzling food reaches you several metres away,but to get the smell from cold food you have to go close.

(N/A) The particles of matter are constantly moving. The rate of diffusion of particles increases with an increase in temperature.
In hot sizzling food,the kinetic energy of the particles is high,which causes them to diffuse rapidly into the air.
Consequently,these particles can travel over a longer distance and reach you from several metres away.
In contrast,the particles in cold food have lower kinetic energy,resulting in a slower rate of diffusion.
Therefore,you need to go close to the cold food to detect its smell.