Question

the smell of hot sizzing food reaches you several metres away,but to get the smell from cold food you have to go close. why it does happen....give correct reason.

Answer 1

smell require medium to travel now

let's understand

smell is nothing a gas which become more lighter when it become hot lighter gas wants to escape with more velocity so it travel a large distance but in case of cold food no gas is escape it's smell is mixed together with food so we have to go near to smell .

Answer 2

The smell of hot sizzling food reaches us several metres away but to get the smell from cold food we have to go close. This is because the rate of diffusion of gas increases with the increase in temperature. In hot food, the rate of diffusion is larger as compared to cold food.