Answers

2016-04-12T22:06:00+05:30
Particles of matter are continuously moving. They possess the kinetic energy. As the temperature rises, particles move faster. Thus, particles that carry smell of hot sizzling food move faster than the smell of the cold food. Therefore, the smell of hot sizzling food can reach us several metres away, but to get smell from a cold food you have to go close.
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2016-04-12T22:34:52+05:30
Gases have the least intermolecular force of attraction. So, diffusion can take place easily in gases. Moreover, as temperature rises, particles move faster and rate of diffusion also increases.

The smell of hot food diffuses much easily in air as compared to that of cold food. So, the smell of hot sizzling food reaches you several metres away, but to take the smell of cold food, you have to go close.
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