Question

the smell of hot sizzling food reaches u several meters away, but to get the smell from cold food you have to go close? ​

Answer 1

The molecules of food which is hot easily get mixed in the air and blow . And therefore we can smell it. but the molecules of cold food do not get mixed in the air and thus we are unable to smell it.

Answer 2

The smell of hot sizzling food reaches several meters away because smell of hot sizzling food have high kinetic energy where as the smell of cold food have less kinetic energy and smell of cold food can not reached us.