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.

List-$I$	List-$II$
$(A)$ Solid dispersed in liquid	$(I)$ Emulsion
$(B)$ Liquid dispersed in liquid	$(II)$ Foam
$(C)$ Gas dispersed in liquid	$(III)$ Gel
$(D)$ Liquid dispersed in solid	$(IV)$ Sol
-	$(V)$ Aerosol

Which of the following statements about colloids is false?

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