JEE Main 2022ChemistrySurface ChemistryMediumMCQ

JEE Main 2022 — Surface Chemistry Question with Solution

JEE Main 2022 (25 Jun Shift 1)

Question

Incorrect statement for Tyndall effect is

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Show full solutionCorrect option: B
Correct answer
BThe diameter of the dispersed particles is much smaller than the wavelength of the light used.

Step-by-step explanation

Tyndall effect is observed only when the following two conditions are satisfied.

(i) The diameter of the dispersed particles is not much smaller than the wavelength of the light used; and

(ii) The refractive indices of the dispersed phase and the dispersion medium differ greatly in magnitude.

This is a characteristic property of the colloid solutions.

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About this question

This is a previous-year question from JEE Main 2022, covering the Surface Chemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.