The diameter of colloidal |GeneralOrganiChemistyJEEMAIN202

JEE MAIN 2023

13-4-23 S2

Question

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: The diameter of colloidal particles in solution should not be much smaller than wavelength of light to show Tyndall effect.
Reason R: The light scatters in all directions when the size of particles is large enough.
In the light of the above statements, choose the correct answer from the options given below:

Select the correct option:

A is true but R is false.

A is false but R is true

Both A and R are correct and R is the correct explanation of A.

Both A and R are correct but R is NOT the correct explanation of A.

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

Sol. Tyndall effect is observed only when the following two conditions are satisfied.
(a) The diameter of the dispersed particle is not much smaller than the wave length of light used.
(b) Refractive indices of dispersed phase and dispersion medium differ greatly in magnitude.

Question Tags

JEE Main

Physics

Easy

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