JEE Main 2022 Chemistry question

Not in JEE Main or NEET syllabus

Incorrect statement for Tyndall effect is :

(1)The refractive indices of the dispersed phase and the dispersion medium differ greatly in magnitude.
(2)The diameter of the dispersed particles is much smaller than the wavelength of the light used.Correct
(3)During projection of movies in the cinemas hall, Tyndall effect is noticed.
(4)It is used to distinguish a true solution from a colloidal solution.

Answer: (2)

Solution

For the Tyndall effect, the diameter of the dispersed particles is not much smaller than

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Question ID VK-024955