Question

the smell of hot sizzling food reaches you several metres away but to get a small from cooked food you have to go close

Answer 1

diffusion : the process by which any smell can surrounded all around is known as diffusion.this is because the air particles transfer the smell all region about some meters .
that's why , the smell of hot sizzling food reaches you several meters away .
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Answer 2

Hot sizzling food smell reaches our because it had more the temprature so more will be the kinetic energy between the particles & more will be the movement hence,more will be the diffusion .but in cold food the temperature is low so,low will be the kinetic energy between the particles and low will be the movement.
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