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प्रश्न
What are emulsions?
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उत्तर
An emulsion is a colloidal dispersion in which both the dispersed phase and the dispersion medium are liquids and the two liquids involved are otherwise immiscible.
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संबंधित प्रश्न
Give reasons for the following observations: Addition of alum purifies the water
What are the different types of emulsions? Give one example of each type.
How do emulsifires stabilise emulsion? Name two emulsifiers.
Action of soap is due to emulsification and micelle formation. Comment.
Give one example each of 'oil in water' and 'water in oil' emulsion.
Answer the following question.
What is the difference between an emulsion and a gel?
Give three uses of emulsions.
Match the types of colloidal systems given in Column I with the name given in Column II.
| Column I | Column II |
| (i) Solid in liquid | (a) Foam |
| (ii) Liquid in solid | (b) Sol |
| (iii) Liquid in liquid | (c) Gel |
| (iv) Gas in liquid | (d) Emulsion |
What is the role of adsorption in froth floatation process used especially for concentration of sulphide ores?
During preparation of ice-cream gelatin is added in ice-creams. What could be the role of gelatin in the process?
