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(A) An ionic micelle is a colloidal aggregate formed by amphiphilic molecules (surfactants) in a polar solvent,typically water,when their concentratio

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sodium stearate to water

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(A) An ionic micelle is a colloidal aggregate formed by amphiphilic molecules (surfactants) in a polar solvent,typically water,when their concentration exceeds the Critical Micelle Concentration $(CMC)$.Sodium stearate $(C_{17}H_{35}COONa)$ is a soap,which is an ionic surfactant.When added to water,the hydrophobic hydrocarbon tails aggregate together while the hydrophilic carboxylate heads face the water,forming an ionic micelle.Therefore,the correct option is $A$.

$X$ (Colloid)	$Y$ (Classification)
$I$. Smoke	$A$. Sol
$II$. Gelatin	$B$. Aerosol
$III$. Soap lather	$C$. Emulsion
$IV$. Milk	$D$. Foam

An ionic micelle is formed on the addition of:

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