Advertisements
Advertisements
Question
Give reason for the following observation :
The smell of hot sizzling food reaches us even from a considerable distance but to get the smell from cold food, we have to go close to it.
Solution
The aroma of hot, sizzling food reaches us very easily even when we are far away from it, but the aroma of cold food reaches us only when we are near it because the rate of diffusion of a hot gas is faster than cold gas. When the gas is hot, the particles have greater kinetic energy and they move faster; therefore, they have a higher rate of diffusion.
APPEARS IN
RELATED QUESTIONS
Give reasons:
A gas fills completely the vessel in which it is kept.
Give a reason for the following observation.
Naphthalene balls disappear with time without leaving any solid.
Name two gases which are supplied in compressed form in homes and hospitals.
A bottle of perfume was opened in a room. The smell of its vapours spread in the entire room. Name the property of gases which is responsible for this behaviour of perfume vapours.
Fill in the following blank with suitable words :
Solid, liquid and gas are the three ........................ of matter.
Why do gases diffuse very fast?
The space between ______ particles is the greatest one.
Comment upon the following:-
fluidity
Comment upon the following:-
kinetic energy
Which of the following is false for gases?
