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प्रश्न
Write a note on Types of emulsion.
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उत्तर
There are two types of emulsions:
- Emulsion of oil in water (o/w type):
An emulsion in which the dispersed phase is oil and the dispersion medium is water is called an emulsion of oil in water.
Example:
- Milk consists of particles of fat dispersed in water.
- Other examples include vanishing cream, paint, etc.
- Emulsion of water in oil (w/o type):
An emulsion in which the dispersed phase is water and dispersion medium is the oil is called emulsion of water in oil.
Example:
- Cod liver oil consists of particles of water dispersed in oil.
- Some other examples of this type include butter, cream, etc.
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संबंधित प्रश्न
Define the following with a suitable example, of each:
Multimolecular colloid
Define the term Electrophoresis.
Distinguish between lyophobic and lyophilic sols.
Explain micelle formation in a soap solution.
Which of the following is multimolecular colloid?
Identify the CORRECT statements from the following.
i. The colour of colloidal dispersion depends on size of colloidal particles.
ii. Tyndall effect is used to distinguish between colloidal dispersion and true solution.
iii. Eosin and congo red are examples of negatively charged sols.
The precipitation power of an electrolyte increases with ______.
Which of the following is NOT true for lyophilic colloids?
Which of the following can form colloidal sol with water?
Which of the following is multimqlecular colloid?
Tyndall effect is useful ______.
Which of the following electrolytes will have maximum coagulating value for AgI/Ag+ solution?
Which of the following process is responsible for the formation of delta at a place where rivers meet the sea?
Gelatin which is a peptide is added in icecreams. What can be its role?
What is collodion?
Why are some medicines more effective in the colloidal form?
Match the items of Column I and Column II.
| Column I | Column II |
| (i) Butter | (a) dispersion of liquid in liquid |
| (ii) Pumice stone | (b) dispersion of solid in liquid |
| (iii) Milk | (c) dispersion of gas in solid |
| (iv) Paints | (d) dispersion of liquid in solid |
Toluene is oxidised to benzoic acid by
For coagulating 200 ml of arsenious sulphide sol, 10 ml of 1 m NaCl solution is required find out the flocculation value of NaCl.
Which of the following substances will precipitate the negatively charge emulsion
The size of a raw mango shrinks to a much smaller size when kept in a concentrated salt solution. Which one of the following processes can explain this?
Blood may be purified by ______.
Starch is an example of which of the following type of colloid?
Identify positively charged sol from following.
Identify the correct decreasing order of precipitation power of flocculating ion added, from following.
