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प्रश्न
Define the term Electrophoresis.
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उत्तर
The movement of colloidal particles under an applied electric potential is called electrophoresis.
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संबंधित प्रश्न
Define the following with a suitable example, of each:
Gel
Distinguish between lyophobic and lyophilic sols.
Identify the dispersed phase and dispersion medium in the following colloidal dispersions.
- milk
- blood
- printing ink
- fog
Explain micelle formation in a soap solution.
Draw labelled diagram Tyndall effect.
Identify the CORRECT statement.
Mist is a colloidal solution of ____________.
Which of the following statements is CORRECT?
Which of the following is an example of liquid-liquid system?
The precipitation power of an electrolyte increases with ______.
The order of coagulating power of following ions in the coagulation of a positive sol is:
i. \[\ce{PO^{3-}_4}\]
ii. \[\ce{SO^{2-}_4}\]
iii. \[\ce{[Fe(CN)6]^{4-}}\]
iv. \[\ce{NO^-_3}\]
Froth is a colloidal solution of ____________.
Tyndall effect is useful ______.
Pumice stone is an example of ______.
Which of the following compounds forms a colloidal solution when dissolved in water?
In which of the following sols there is low affinity between dispersed phase and dispersion medium?
Freshly prepared precipitate sometimes gets converted to colloidal solution by ______.
An emulsion cannot be broken by:
(i) heating
(ii) adding more amount of dispersion medium
(iii) freezing
(iv) adding emulsifying agent
A colloid is formed by adding \[\ce{FeCl3}\] in excess of hot water. What will happen if excess sodium chloride is added to this colloid?
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.
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?
Which of the following electrolytes will be most effective in coagulating negative sol?
Blood may be purified by ______.
Identify the colloidal molecule containing hydrophilic head and hydrophobic tail within it.
Starch is an example of which of the following type of colloid?
Identify the correct decreasing order of precipitation power of flocculating ion added, from following.
