Which of the following is an example of solid foam?
Which of the following is an example of solid foam?
The correct option is B Bread
The explanation for the correct option:
- Colloids are substances having 1-1000 nm size particles dispersed in the medium
- The particles dispersed in the medium are called the dispersed phase and the medium in which particles are dispersed is called the dispersion medium
- Depending upon the states of the dispersed phase and dispersion medium, different types of colloids are present
- Foam is a type of colloid in which the dispersed phase is gas and the dispersion medium is liquid
- Solid foam is another type of colloid where the dispersed phase is gas and the dispersion medium is solid
(B) Bread: It is a type of colloid where the dispersed phase is gas and the dispersion medium is solid. The carbon dioxide gas released during the formation of bread act as the dispersed phase here
The explanation for the incorrect option:
(A) Butter: It is a type of colloid where the dispersed phase is liquid and the dispersion medium is solid and is called solid emulsion. Cheese is an example of this type
(C) Shaving cream lather: It is belonging to the category of foam which is a colloid where the dispersed phase is gas and the dispersion medium is liquids. Whipped cream is an example of this type of colloid
(D) Ruby glass: It is a type of colloid solid sol where the dispersed phase and dispersion medium are solids and is called solid sol. Colored glass is also an example of this
Therefore, option (B), i.e.., Bread is correct which belongs to solid foam.
Bread
The explanation for the correct option:
- Colloids are substances having 1-1000 nm size particles dispersed in the medium
- The particles dispersed in the medium are called the dispersed phase and the medium in which particles are dispersed is called the dispersion medium
- Depending upon the states of the dispersed phase and dispersion medium, different types of colloids are present
- Foam is a type of colloid in which the dispersed phase is gas and the dispersion medium is liquid
- Solid foam is another type of colloid where the dispersed phase is gas and the dispersion medium is solid
(B) Bread: It is a type of colloid where the dispersed phase is gas and the dispersion medium is solid. The carbon dioxide gas released during the formation of bread act as the dispersed phase here
The explanation for the incorrect option:
(A) Butter: It is a type of colloid where the dispersed phase is liquid and the dispersion medium is solid and is called solid emulsion. Cheese is an example of this type
(C) Shaving cream lather: It is belonging to the category of foam which is a colloid where the dispersed phase is gas and the dispersion medium is liquids. Whipped cream is an example of this type of colloid
(D) Ruby glass: It is a type of colloid solid sol where the dispersed phase and dispersion medium are solids and is called solid sol. Colored glass is also an example of this
Therefore, option (B), i.e.., Bread is correct which belongs to solid foam.
