An emulsion is a colloidal solution formed by mixing:
An emulsion is a colloidal solution formed by mixing:
The correct option is A Two immiscible liquids
Explanation of the correct option:
(a):
Emulsion: A heterogeneous colloidal solution in which the dispersion phase and dispersion medium are liquids.
- An emulsion is a mixture of two or more liquids that are immiscible with each other.
Classification of emulsion:
An emulsion is classified into the following based on the nature of the dispersed phase and the dispersion medium.
- Oil in water type emulsion (o/w): In this type of emulsion, oil is dispersed phase and water is the dispersion medium. Example: Milk. In milk, fat globules (oil) are suspended in water.
- Water in oil type emulsion (w/o): In this type of emulsion, water is the dispersed phase and oil is the dispersion medium. Example: Margarine. In margarine, water is suspended in oil.
- Dispersed phase: The substance that is dispersed as the colloidal particle in the dispersion medium is called the dispersed phase.
- Dispersion medium: The medium in which colloidal particles are distributed is called the dispersion medium. Example: In the case of a starch solution, starch is the dispersed phase and water is the dispersion medium.
Explanation of the incorrect options:
(b) Two miscible liquids: These form a homogeneous solution with uniform distribution. Hence, not a colloid and additionally, not an emulsion.
(c) Any two solid: A colloidal solution formed by the mixing of two solids is called a solid sol. Example: Coloured gemstones
(d) Any two gases: A mixture of any two gases also forms a homogeneous mixture with uniform distribution of the gases. Hence, not a colloid and additionally, not an emulsion.
Hence, option (a) is correct.
Two immiscible liquids
Explanation of the correct option:
(a):
Emulsion: A heterogeneous colloidal solution in which the dispersion phase and dispersion medium are liquids.
- An emulsion is a mixture of two or more liquids that are immiscible with each other.
Classification of emulsion:
An emulsion is classified into the following based on the nature of the dispersed phase and the dispersion medium.
- Oil in water type emulsion (o/w): In this type of emulsion, oil is dispersed phase and water is the dispersion medium. Example: Milk. In milk, fat globules (oil) are suspended in water.
- Water in oil type emulsion (w/o): In this type of emulsion, water is the dispersed phase and oil is the dispersion medium. Example: Margarine. In margarine, water is suspended in oil.
- Dispersed phase: The substance that is dispersed as the colloidal particle in the dispersion medium is called the dispersed phase.
- Dispersion medium: The medium in which colloidal particles are distributed is called the dispersion medium. Example: In the case of a starch solution, starch is the dispersed phase and water is the dispersion medium.
Explanation of the incorrect options:
(b) Two miscible liquids: These form a homogeneous solution with uniform distribution. Hence, not a colloid and additionally, not an emulsion.
(c) Any two solid: A colloidal solution formed by the mixing of two solids is called a solid sol. Example: Coloured gemstones
(d) Any two gases: A mixture of any two gases also forms a homogeneous mixture with uniform distribution of the gases. Hence, not a colloid and additionally, not an emulsion.
Hence, option (a) is correct.
