Question

When an open bottle of scent is kept in a corner of the room, its odour is felt in all the corners. This is due to the phenomenon of __:
A.Vaporization
B.Evaporation
C.Diffusion
D.Sublimation

Answer 1

Hint: Sublimation: The process of conversion of solid to gas without undergoing to liquid phase, is known as sublimation. Diffusion: It is defined as the movement of one type of gas molecule to the empty space around it.

Complete step by step solution:
There are mainly three states of matter known as: solids, liquids and gases.
Solids: Solids are those states of matter which have definite shape and definite volume. Fixed shape means if we place them in any container then their shape will not change. It will be the same as before. In solids molecules are closely packed.
Liquids: Liquids are those states of matter whose atoms or particles are held together by intermolecular force which is less than that of forces in solids. Liquids have definite volume but not have definite shape i.e. they will take the shape of the container. For example: if we place them in a cylindrical vessel then they will look like cylindrical shapes.
Gases: Gases are those states of matter whose atoms or particles are held together by a very weak force of attraction i.e. vanderwaal force of attraction which is less than that of forces in solids and in liquids. Gases do not have definite volume and do not have definite shape. They move in the whole container in which they are placed. As they have a very weak force of attraction hence they occupy more space because they randomly move everywhere in the space.
Now let us talk about diffusion and effusion:
Diffusion: It is defined as the movement of one type of gas molecule to the empty space around it i.e. from the region of high concentration to the region of low concentration. For example: the smell of food, tea and perfume in the atmosphere.
Effusion: It is defined as the process in which gas escapes from a container through hole of diameter which is smaller than the mean free path of the molecules. For example: the escape of gas from a hole in a balloon to the atmosphere.
Sublimation: The process of conversion of solid to gas without undergoing a liquid phase, is known as sublimation.
Vaporization: It is defined as the process of conversion of liquid to phase, is known as vaporization.
Evaporation: It is defined as the process of conversion of liquid phase to gas phase.
Now here in the question, when an open bottle of scent is kept in a corner of the room, its odour is felt in all the corners. This is due to the phenomenon of diffusion.

Hence option C is correct.

Note: Sedimentation: It is defined as the process to remove suspended solid particles from using gravity, is known as sedimentation. For example: removal of sand or salt from water.
Decantation: It is defined as the process for the separation of mixtures of immiscible liquids (which are not miscible), known as decantation.