When a few drops of dilute $HCl$ are added to a freshly prepared precipitate of ferric hydroxide,a reddish-brown colloidal solution is obtained. This phenomenon is known as .......

Which of the following is not a property of a sol?

If gold number of $A$,$B$,$C$ and $D$ are $0.005$,$0.05$,$0.5$ and $5$ respectively,then which of the following will have the highest protective power?

Which of the following is not a colloid?

Statement $I:$ For colloidal particles,the values of colligative properties are of small order as compared to values shown by true solutions at the same concentration.
Statement $II:$ For colloidal particles,the potential difference between the fixed layer and the diffused layer of opposite charges is called the electrokinetic potential or zeta potential.
In the light of the above statements,choose the correct answer from the options given below.

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