Question

Give reason for the following observation the smell of hot sizzling food reaches us even from a considerably distance but to get the smell from cold food we have to go close to it

Answer 1

the smell of hot sizzling food reaches us from a conderable dist. due the presence of kinitic energy in it as more the kinitic energy more the excited particles of the food becomes and travel toward us so we could smell as on the other hand cold food dose't contain enough kinitic energy to be smelt from a dist. 

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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.