$10 \ mL$ of $0.5 \ M$ $NaCl$ is required to coagulate $1 \ L$ of $Sb_2S_3$ sol in $2$ hours. The flocculating value of $NaCl$ (in millimoles) is:

$A$ is a protecting colloid. The following data is obtained for preventing the coagulation of $10 \text{ mL}$ of gold sol to which $1 \text{ mL}$ of $10\% \text{ NaCl}$ is added. What is the gold number of $A$?

$1$. Expt. No.	$2$. Wt (in mg) of $A$ added to gold sol	$3$. Coagulation
$1$	$40$	Prevented
$2$	$35$	Prevented
$3$	$25$	Not prevented
$4$	$32$	Not prevented
$5$	$33$	Prevented

$A$ colloidal solution is subjected to an electrical field. The particles move towards the anode. The coagulation of the same sol is studied using $NaCl$,$BaCl_2$,and $AlCl_3$ solutions. Their coagulating power should be:

$A$ sol of $AgI$ is prepared by mixing equal volumes of $0.1 \ M \ AgNO_{3}$ and $0.2 \ M \ KI$. Which of the following statements is correct?

What are micelles? Give an example of a micellar system.

Which of the following has the minimum value of flocculating power?