Match the following:

List-$I$ (Colloid Type)	List-$II$ (Example)
$A$. Sol	$I$. Cloud
$B$. Foam	$II$. Whipped cream
$C$. Gel	$III$. Paint
$D$. Aerosol	$IV$. Butter

The correct answer is:

Fog is a colloidal system of

Which characteristic is true in respect of colloidal particles?

Choose the correct reason$(s)$ for the stability of the lyophobic colloidal particles.
$(A)$ Preferential adsorption of ions on their surface from the solution.
$(B)$ Preferential adsorption of solvent on their surface from the solution.
$(C)$ Attraction between different particles having opposite charges on their surface.
$(D)$ Potential difference between the fixed layer and the diffused layer of opposite charges around the colloidal particles.

Which of the following will show Tyndall effect?

When silver nitrate solution is added to potassium iodide solution,then the sol produced is: