Assertion Colloidal sols scatter light while true solutions do not. Reason The particles in the colloidal sol move slower than that of the true solutions. -Chemistry

Assertion Colloidal sols scatter light while true solutions do not. Reason The particles in the colloidal sol move slower than that of the true solutions. -Chemistry
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1 Answer

Answer :

Both assertion and reason are true but the reason is not the correct explanation of assertion. The size of colloidal particles is large enough to scatter light while particles of a true solution are too small to scatter light.
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If an electric field is applied to a colloidal sol, the dispersed phase particles are found to move towards the electrode of opposite charge. If however, the dispersed phase is made stationary, the dispersion medium is found to move in the opposite direction. What is the term used for such movement of dispersion medium ?

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