Types of Colloids and Their Properties

The video explains different types of mixtures, focusing on colloids. It covers homogeneous and heterogeneous mixtures, suspensions, and colloids, highlighting their properties and differences. The Tyndall effect and various types of colloids are discussed, along with methods to prepare colloids. Emulsions and the role of emulsifying agents are explained, as well as the impact of electrical charges on colloidal particles.

What type of mixture is formed when mud is mixed with water?

• Solution

• Colloid

• Suspension

• Emulsion

Which phenomenon explains why colloids appear cloudy?

• Tyndall effect

• Brownian motion

• Osmosis

• Diffusion

What is the dispersed phase in a colloid?

• The particles themselves

• The medium in which particles are dispersed

• The solvent in a solution

• The solute in a solution

How can colloidal particles be prepared by breaking down larger particles?

• By dissolving them in water

• By heating them

• By grinding or milling

• By freezing them

What is an emulsion?

• A mixture of two immiscible liquids

• A gas dispersed in a liquid

• A mixture of two miscible liquids

• A solid dispersed in a gas

What role does an emulsifying agent play in an emulsion?

• It prevents the coalescence of dispersed droplets

• It increases the viscosity of the mixture

• It changes the color of the emulsion

• It speeds up the separation of liquids

How can charged colloidal particles be removed from a mixture?

• By heating the mixture

• By using a centrifuge

• By passing the mixture through an electrostatic precipitator

• By adding more solvent