T9: Colloid

Below are the properties of _____.

-Do not pass through filter paper or semipermeable membrane.

-Particles settle down under gravity

-Do not diffuse

• Colloidal dispersions

• Coarse dispersions

• Molecular dispersions

Match the following

• • amphiphilic

• • Association

• • solvent loving

• • Lyophilic

• • solvent hating

• • Lyophobic

Which of the following is FALSE about Critical micelle concentration?

• As amphiphile concentration is reduced: both the interphase and bulk phase become saturated with monomers

• Below C.M.C: amphiphiles are adsorbed at the air/water interface

• More excedd amphiphile added: amphiphiles aggregate to form micelles

Organize these options into the right colloidal system

Groups:

(a) Foam

,

(b) Emulsion

,

(c) Sol

,

(d) Gel

• Mayonnaise

• Whipped cream

• Uncooked custard

• Jam

A​ (a)   is a colloid in which solid particles are dispersed through a liquid continuous phase.

• sol
• gel
• foam