JEE Main 2017 — Surface Chemistry Question with Solution
JEE Main 2017 (02 Apr)
Question
The Tyndall effect is observed only when the following conditions are satisfied,
The diameter of the dispersed particles is much smaller than the wavelength of the light used.
The diameter of the dispersed particle is not much smaller than the wavelength of the light used.
The refractive indices of the dispersed phase and dispersion medium are almost similar in magnitude.
The refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude.
The diameter of the dispersed particles is much smaller than the wavelength of the light used.
The diameter of the dispersed particle is not much smaller than the wavelength of the light used.
The refractive indices of the dispersed phase and dispersion medium are almost similar in magnitude.
The refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude.
Choose an option
Show full solutionCorrect option: A
Correct answer
A
Step-by-step explanation
The Tyndall effect is an easy way of determining whether a mixture is colloidal or not. When light is shined through a true solution, the light passes cleanly through the solution, however when light is passed through a colloidal solution, the substance in the dispersed phases scatters the light in all directions, making it readily seen.
The Tyndall effect is observed only when,
The diameter of the dispersed particle is not much smaller than the wavelength of the light used.
The refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude.
The Tyndall effect is observed only when,
The diameter of the dispersed particle is not much smaller than the wavelength of the light used.
The refractive indices of the dispersed phase and dispersion medium differ greatly in magnitude.
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Surface Chemistry chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2017, 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.