Colloid Stability Explained
A colloid is considered stable primarily because its dispersed particles are kept suspended within the dispersion medium and do not separate out easily.
Key Reason for Colloid Stability
- Non-Settling Particles: The main reason a colloid is stable is that its dispersed particles are small enough and possess enough kinetic energy (due to Brownian motion) or surface charge repulsion to remain suspended indefinitely. They do not settle down under the influence of gravity when left undisturbed. This is the defining characteristic of a stable colloidal system.
Analyzing Other Options
- Option 1 (Dissolve completely): This describes a true solution, where particles are molecularly dispersed and completely dissolved, not a colloid.
- Option 2 (Separated by filtration): Colloidal particles cannot be easily separated by ordinary filtration, though they can be separated by ultrafiltration. This is a property, not the primary reason for stability.
- Option 4 (Chemical reaction): Stability in colloids is generally due to physical factors (Brownian motion, electrostatic repulsion), not chemical reactions with the medium. Chemical reactions can often lead to destabilization.
Therefore, the inability of colloidal particles to settle down is the hallmark of their stability.
Similar Questions
Which of the following options does NOT represent a property of solids?
Which of the following statements is correct about continuous movement of particles of matter?
- When 1 kg of water is cooled from \(4^\circ\text{C}\) to \(0^\circ\text{C}\), its volume ______.
- ______ is the heat per unit mass required to change a substance from solid into liquid at the same temperature and pressure.
- Density of ice is ______ compared to density of water.
- Which of the following glows with special colour depending on the nature of gas in the fluorescent tube?
Which of the following statement is INCORRECT ?
Which of the following does not increase the rate of evaporation ?
Which of the following options does not represent a property of suspension?
Which of the following non - metals is a liquid ?
Important Questions from States of Matter
Which is correct statement ?
According to Charle's Law, which of the following is constant?
Which of the following statements is/are correct?
I. Mass vapor is obtained in the air by evaporation and transpiration.
II. Water circulation between the oceans and the water bodies is called the water cycle.
Which gas gives pungent smell to LPG cylinders as a warning of leakage?
If C Sand C Iare the equilibrium concentration of impurities in the solid and liquid near the interface respectively, then for dilute solutions encountered in silicon growth, an equilibrium segregation coefficient k amay be defined as:
