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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Assertion: Colloidal solutions do not show brownian motion. Reason: Brownian motion is responsible for stability of sols.

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प्रश्न

Assertion: Colloidal solutions do not show brownian motion.

Reason: Brownian motion is responsible for stability of sols.

विकल्प

  • Assertion and reason both are correct and the reason is correct explanation of assertion.

  • Assertion and reason both are correct but reason does not explain assertion.

  • Assertion is correct but reason is incorrect.

  • Both assertion and reason are incorrect.

  • Assertion is incorrect but reason is correct.

MCQ
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उत्तर

Assertion is incorrect but reason is correct.

Explanation:

Colloidal particle shows Brownian movement. The Brownian movement has a stirring effect which does not permit the particles to settle and thus, is responsible for the stability of sols.

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अध्याय 5: Surface Chemistry - Exercises [पृष्ठ ७३]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
अध्याय 5 Surface Chemistry
Exercises | Q 75 | पृष्ठ ७३

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The conditions given below are in the context of observing Tyndall effect in colloidal solutions:

  1. The diameter of the colloidal particles is comparable to the wavelength of light used.
  2. The diameter of the colloidal particles is much smaller than the wavelength of light used.
  3. The diameter of the colloidal particles is much larger than the wavelength of light used.
  4. The refractive indices of the dispersed phase and the dispersion medium are comparable.
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Choose the most appropriate conditions from the options given below:


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