Question

Classify each of these statements as always true, AT; sometimes true, ST; or never true, NT. Never True 11. The scattering of light by colloidal particles is called Brownian motion. 12. Heterogeneous aqueous systems can be separated by filtration. 13. Emulsifying agents are essential to forming and maintaining emulsions. 14. Colloids are dispersions of liquids in liquids. 15. The random motion of particles is known as the Tyndall effect.

Answer 1

Step-by-step explanation:

Here's how each statement should be classified:

- Statement 11: Always True (AT)

- Statement 12: Sometimes True (ST)

- Statement 13: Always True (AT)

- Statement 14: Never True (NT)

- Statement 15: Sometimes True (ST)

Statement 11 is always true because Brownian motion is the name given to the random movement of particles in colloidal suspensions. Statement 12 is sometimes true because some heterogeneous aqueous systems can be separated by filtration, but others cannot. Statement 13 is always true because emulsifying agents are required to form and maintain emulsions