Which of the following statement is correct for emulsion ?

Question

Accepted Answer

Option 3 is correct because emulsions can indeed be broken into their constituent parts by centrifuging. Centrifugation is a process that uses the application of centrifugal force to separate particles from a solution according to their size, shape, density, and viscosity of the medium. In the case of emulsions, which are mixtures of two immiscible liquids, centrifuging can cause the denser liquid to separate from the less dense liquid, effectively breaking the emulsion into its constituent parts.

Now, let's examine why the other options are incorrect:

1. **Option 1: They can be diluted by dispersed liquid.**
   - This statement is incorrect because emulsions cannot be diluted by adding more of the dispersed phase. Adding more of the dispersed liquid would not dilute the emulsion; instead, it could destabilize it or change its properties, potentially leading to phase separation.

2. **Option 2: They do not show Brownian movement.**
   - This statement is incorrect because emulsions do exhibit Brownian movement. Brownian movement refers to the random motion of particles suspended in a fluid, resulting from their collision with the fast-moving molecules in the fluid. In emulsions, the dispersed droplets are subject to Brownian motion.

3. **Option 4: They do not show Tyndall effect.**
   - This statement is incorrect because emulsions do show the Tyndall effect. The Tyndall effect is the scattering of light by particles in a colloid or in very fine suspensions. Since emulsions are colloidal systems, they scatter light and thus exhibit the Tyndall effect.

In conclusion, Option 3 is the correct answer because it accurately describes a method by which emulsions can be separated into their constituent parts, while the other options contain inaccuracies regarding the properties and behaviors of emulsions.