Match the following types of colloids with their examples:

$i$. Foam	$a$. Smoke
$ii$. Gel	$b$. Cell fluid
$iii$. Aerosol	$c$. Jellies
$iv$. Emulsion	$d$. Rubber
	$e$. Froth
	$f$. Milk

In a multimolecular colloidal sol,the atoms or molecules are held together by which forces?

$20 \ mL$ of $0.5 \ M \ NaCl$ is required to coagulate $200 \ mL$ of $As_2S_3$ sol in $2$ hours. The coagulating value of $NaCl$ is $...........$.

Among the colloids cheese $(C)$,milk $(M)$ and smoke $(S)$,the correct combination of the dispersed phase and dispersion medium,respectively is

Which of the following electrolytes is the most effective for the coagulation of ferric hydroxide sol?

In each of four separate beakers $(I, II, III, IV)$,$X \ mL$ of $y \ M \ Fe_2O_3 \cdot xH_2O$ colloidal solution is present. Equal volume and equal concentration of $KCl, K_4[Fe(CN)_6], K_3PO_4$ and $K_2SO_4$ were added into $I, II, III$ and $IV$ respectively. The efficiency of precipitation in these beakers follows the order: