Write the name of four methods to coagulate lyophobic colloids

Answer

To coagulate lyophobic colloids, we can use the following four methods:

1. **Electrophoresis**: This method involves the migration of colloidal particles towards the oppositely charged electrode. As the particles move, they eventually settle down and coagulate.

2. **Mixing Oppositely Charged Sols**: When two oppositely charged sols are mixed, they undergo neutralization. This neutralization leads to the coagulation of the colloidal particles, causing them to settle.

3. **Boiling**: By boiling the colloid, the kinetic energy of the colloidal particles increases. This increase in energy causes the particles to collide more frequently, leading to coagulation and settling.

4. **Addition of Electrolyte**: Introducing an electrolyte into the colloid can neutralize the charge on the colloidal particles. This neutralization facilitates coagulation, allowing the particles to settle down.