Which of the following statements about collo | vedclass

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(B) The correct answer is $B$. $(a)$ Colloidal particles are small enough to pass through ordinary filter paper. $(b)$ The freezing point of a colloid

Vedclass · Accepted Answer

Freezing point of colloidal solution is lower than true solution at same concentration of a solute

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(B) The correct answer is $B$. $(a)$ Colloidal particles are small enough to pass through ordinary filter paper. $(b)$ The freezing point of a colloidal solution is the same as that of a true solution at the same molar concentration,because the number of particles in a colloidal solution is much smaller than in a true solution,leading to negligible depression in freezing point. Thus,the statement that it is lower is false. $(c)$ When $AgNO_3$ is added to $KI$ (excess $KI$),$I^-$ ions are adsorbed on the surface of $AgI$ particles,forming a negatively charged colloid. $(d)$ Addition of excess electrolyte causes coagulation (precipitation) of colloidal particles due to the neutralization of charge.

Which of the following statements about colloids is false?

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