Question

Smell of hot Rajma/food reaches faster than the cold food.

Answer 1

this is because of diffusion the particles of hot food have higher tendency to intermix with air particles because if this the smell of hot food reaches faster

Answer 2

When molecules of some volatile substances from hot sizzling food diffuse into air and reach the odur sensitive part of our nose we have the perception of smell.

At higher temperature of molecules diffuse into air at a faster rate and therefore travel long distances.

Hence the smell of hot sizzling food reaches as quickly even when we are several metres away.

While on the contrary , when the food is called the vapour diffuse is at a slower rate and therefore does not travel longer distances.

So, one has to come closer to have the perception of smell.