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What is the dispersed phase and dispersi...

What is the dispersed phase and dispersion medium in gel?

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The correct Answer is:
Dispersed phase is liquid and dispersion medium is solid.
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How are the colloidal solutions classified on the the basis of physical states of the dispersed phase and dispersion medium ?

Based on the type of particles in the dispersed phase and dispersion medium, give one example each of associated colloid and multimolecular colloid.

The Tyndall effect is observed only when following conditions are satisfied: (A) the diameter of the dispersed particles is much smaller than the wavelength of the light used. (B) the diameter of the dispersed particle is not much smaller than the wavelength of the light use (C) the refreactive indices of the dispersed phase and dispersion medium are almost similar in magnitude (D) the refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude.

Tyndall effect is observed only when following conditions are satisfied: a) the diameter of the dispersed particles is much smaller than the wavelenght of the light used. b) the diameter of the dispersed particles is not much smaller than the wavelengh of the light used c) the refractive indices of the dispersed phase and dispersion medium are almost similar in magnitude. d) the refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude

The Tyndall effect is observed only when following conditions are satisfied : (a) The diameter of the dispersed particles is much smaller than the wavelength of the light used. (b) The diameter of the dispersed particles is not much smaller than the wavelength of the light used (c) The refractive indices of the dispersed phase and dispersion medium are almost similar in magnitude. (d) The refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude.

AAKASH INSTITUTE-SURFACE CHEMISTRY -TRY YOURSELF
  1. Give one example each of multimolecular and macro-molecular colloids.

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  2. Explain the cleansing action of soaps.

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  3. What is the dispersed phase and dispersion medium in gel?

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  4. Why true solutions do not exhivit tyndall effect?

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  5. Write the name of four methods to coagulate lyphobic colloids

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  6. What is most accepted reason for the presence of charge on colloids?

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  7. Define coagulation value.

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  8. Why adsorption is exothermic ?

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  9. What is the effect on entropy change (Delta S) in adsorption ?

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  10. Which adsorption has low enthalpy of adsorption ?

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  11. Low temperature is favourable for which type of adsorption ?

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  12. Which type of gases are readily adsorbed by solids ?

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  13. Write any two characteristics of Chemisorption.

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  14. Why dows physisoption decrease with increase of temperature ?

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  15. What is the change in mass and composition of catalyst after the compl...

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  16. Write the name of scientist who suggested the term catalyst first?

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  17. Metals of how many groups of periodic table show macimum catalytic act...

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  18. Which catalyst is used to convert alcohol directly to petrol?

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  19. What are optimum temperature and pH for the enzymes to act best ?

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  20. Which enzyme converts milk into curd?

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