Which of the following is an example of multimolecular colloids?

Match the items in List-$I$ with the items in List-$II$.

List-$I$	List-$II$
$A$. Negatively charged sol	$I$. Emulsion
$B$. Milk	$II$. Kala-azar
$C$. Gold number	$III$. $FeCl_3$ solution is added to excess $NaOH$ solution
$D$. Colloidal antimony	$IV$. Protection of colloids

For micelle formation,which of the following statements are correct?
$A$. Micelle formation is an exothermic process.
$B$. Micelle formation is an endothermic process.
$C$. The entropy change is positive.
$D$. The entropy change is negative.

Which of the following has the minimum coagulating power?

Which of the following statements is incorrect?

On addition of $1 \ mL$ solution of $10\% \ NaCl$ to $10 \ mL$ gold sol in presence of $0.025 \ g$ of starch,the coagulation is just prevented. The gold number of starch is