JEE Main 202225 JuneMorning Shift
- Exam
- JEE Main
- Year
- 2022
- Date
- 25 June
- Shift
- Morning Shift
- Subject
- Chemistry
- Chapter
- Surface Chemistry
JEE Main 2022 · 25 June · Morning Shift · Chemistry · Surface Chemistry
Incorrect statement for Tyndall effect is
Incorrect statement for Tyndall effect is
Options
- AThe refractive indices of the dispersed phase and the dispersion medium differ greatly in magnitude.
- BThe diameter of the dispersed particles is much smaller than the wavelength of the light used.
- CIt is used to distinguish a true solution from a colloidal solution.
- DDuring projection of movies in the cinemas hall, Tyndall effect is noticed.
Correct answer
B. The diameter of the dispersed particles is much smaller than the wavelength of the light used.
Step-by-step solution
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.