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JEE CHEMISTRY MCQ: SURFACE CHEMISTRY
1
Medium
1 of 1
Understanding
+4 | -1
The Tyndall effect is observed only when following conditions are satisfied
1. The diameter of the dispersed particles is much smaller than the wavelength of the light used
2. The diameter of the dispersed particle is not much smaller than the wavelength of the light used
3. The refractive indices of the dispersed phase and dispersion medium are almost similar in magnitude
4. The refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude
1. The diameter of the dispersed particles is much smaller than the wavelength of the light used
2. The diameter of the dispersed particle is not much smaller than the wavelength of the light used
3. The refractive indices of the dispersed phase and dispersion medium are almost similar in magnitude
4. The refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude
View answer and explanation
Correct option: B
2 and 4
Option B (2 and 4) is correct because the Tyndall effect requires the dispersed particle size to be comparable to the wavelength of light and a significant difference in refractive indices between the dispersed phase and the medium.
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