The function of gum-arabic in the preparation of Indian ink is:

The correct statement$(s)$ related to colloids is(are):
$(A)$ The process of precipitating colloidal sol by an electrolyte is called peptization.
$(B)$ Colloidal solution freezes at a higher temperature than the true solution at the same concentration.
$(C)$ Surfactants form micelles above the critical micelle concentration $(CMC)$. $CMC$ depends on temperature.
$(D)$ Micelles are macromolecular colloids.

An example of an associated colloid is

Colloidal solutions can be purified by

Which of the following is a hydrophilic colloidal sol?

If $As_2S_3$ sol is negatively charged,which of the following will be most effective in causing its coagulation?