Which of the following will show Tyndall effe | vedclass

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Question

(B) Micelle formation takes place above a particular temperature called Kraft temperature and above a particular concentration called critical micelle

Vedclass · Accepted Answer

Aqueous solution of soap above critical micelle concentration

Vedclass · Answer

(B) Micelle formation takes place above a particular temperature called Kraft temperature and above a particular concentration called critical micelle concentration $(CMC)$.Below $CMC$,no micelle formation takes place and the substance does not act as a colloid.Tyndall effect is the property of scattering of light shown exclusively by colloids.An aqueous solution of sodium chloride and sugar act as true solutions,so they will never show Tyndall effect.However,soap solution above $CMC$ forms micelles,which are colloidal particles,and hence it shows Tyndall effect.Therefore,aqueous solution of soap above critical micelle concentration shows Tyndall effect.

List-$I$	List-$II$
$A$. Negatively charged sol	$I$. $Fe_{2}O_{3} \cdot xH_{2}O$
$B$. Macromolecular colloid	$II$. $CdS$ sol
$C$. Positively charged sol	$III$. Starch
$D$. Cheese	$IV$. $A$ gel

Which of the following will show Tyndall effect?

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The qualitative sketches $I$,$II$,and $III$ given below show the variation of surface tension with molar concentration of three different aqueous solutions of $KCl$,$CH_3OH$,and $CH_3(CH_2)_{11}OSO_3^{-}Na^{+}$ at room temperature. The correct assignment of the sketches is

Match List-$I$ with List-$II$.

List-$I$ List-$II$

$A$. Negatively charged sol $I$. $Fe_{2}O_{3} \cdot xH_{2}O$

$B$. Macromolecular colloid $II$. $CdS$ sol

$C$. Positively charged sol $III$. Starch

$D$. Cheese $IV$. $A$ gel

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