$A$ colloidal system consisting of a gas dispersed in a solid is called a/an:

The correct statements about the properties of colloidal solutions are:
$A$. Tyndall effect is used to distinguish between a colloidal solution and a true solution
$B$. Zeta potential is related to movement of colloidal particles
$C$. Brownian motion in colloidal solution is faster if the viscosity of the solution is very high.
$D$. Brownian motion stabilises the sols

Muddy water can be purified through coagulation using

What does the gold number indicate?

Which of the following is an example of multimolecular colloids?

The movement of colloidal particles towards the oppositely charged electrodes on passing electricity is known as