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Which of the following makes the hydroph...

Which of the following makes the hydrophilic sol unstable?

A

Dialysis

B

Addition of electrolyte

C

Addition of alcohol

D

Addition of alcohol and electrolyte both

Text Solution

Verified by Experts

The correct Answer is:
D
When solvent such as alcohol added to lyophilic sols, the dehydration of dispersed phase occurs. Under this condition a small quantity of electrolyte can bring about coagulation.
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ERRORLESS-SURFACE CHEMISTRY-NCERT BASED QUESTIONS (Colloids, Emulsion, Gel and their properties with Application)
  1. Select wrong statement

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  2. The coagulation of 200 mL of a positive sol took place when 0.73 g HCl...

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  3. Which of the following makes the hydrophilic sol unstable?

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  4. Which has least gold number

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  5. Cloud bursts due to :

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  6. The ability of anion, to bring about coagulation of a given colloid, d...

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  7. The coagulation of 10 ml of colloidal solution of gold is completely p...

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  8. On addition of one mL solution of 10% NaCl to 10 mL gold sol in the pr...

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  9. Which of the following electrolytes will have maximum coagulating valu...

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  10. Which of the following process is responsible for the formation of del...

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  11. Milk can be preserved by adding a few drops of

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  12. To coagulate gelatin sol, which of the following is most effective ?

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  13. Which of the following ions can cause coagulation of protons ?

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  14. Which of the following colloids cannot be easily coagulated ?

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  15. If the dispersed phase is a liquid and the dispersion medium is a soli...

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  16. Alum helps in purifying water by :

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  17. Commercial detergents mainly contain

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  18. Give one example of aerosol and gel.

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  19. The emulsifying agent in milk is

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  20. Silver iodide is used for producing artificial rains because Agl

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