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Why are colloids able to pass light through them?

Important Questions on Surface Chemistry

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Write short notes on the following: Tyndall effect.
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What is observed when a beam of light is passed through a colloidal solution? 
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The phenomenon of scattering of light by colloidal particles is called ______.

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The right option for the statement "Tyndall effect is exhibited by", is:
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The haemoglobin and the gold sol are examples of
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Why is Tyndall effect shown by colloidal particles? State four instances of observing the Tyndall effect.
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Explain, what is observed when a beam of light is passed through a colloidal solution.
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A colloidal solution placed in dark is illuminated with a bright white light source. This colloidal solution is observed from a direction at right angles to the direction of the light source. Which of the following options best describes what is observed?
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What happens when a beam of light is passed through a colloidal solution?
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What happens when a beam of light passes through a colloidal sol?
HARD

Consider the following statements related to colloids.

(I) Lyophobic colloids are not formed by simple mixing of dispersed phase and dispersion medium.

(II) For emulsions, both the dispersed phase and the dispersion medium are liquid.

(III) Micelles are produced by dissolving a surfactant in any solvent at any temperature.

(IV) Tyndall effect can be observed from a colloidal solution with dispersed phase having the same refractive index as that of the dispersion medium.

The option with the correct set of statements is

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For coagulation of arsenious sulphide sol, which of the following salt solutions will be most effective?
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The conditions given below are in the context of observing Tyndall effect in colloidal solutions:
(A) The diameter of the colloidal particles is comparable to the wavelength of light used.
(B) The diameter of the colloidal particles is much smaller than the wavelength of light used.
(C) The diameter of the colloidal particles is much larger than the wavelength of light used.
(D) The refractive indices of the dispersed phase and the dispersion medium are comparable.
(E) The dispersed phase has a very different refractive index from the dispersion medium. Choose the most appropriate conditions from the options given below:
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Which property of colloidal solution is independent of charge on the colloidal particles?