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Questions and Answers
Which of the following best describes a colloid?
Which of the following best describes a colloid?
- A mixture that settles down when left undisturbed
- A mixture that can be separated by filtration
- A mixture with particles too small to be seen (correct)
- A homogeneous mixture
Which technique can be used to separate colloidal particles?
Which technique can be used to separate colloidal particles?
- Centrifugation (correct)
- Distillation
- Evaporation
- Filtration
What happens to a beam of light passing through a colloid?
What happens to a beam of light passing through a colloid?
- It becomes invisible
- It gets absorbed by the particles
- It scatters and becomes visible (correct)
- It passes through without any change
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Study Notes
Colloids
- A colloid is a mixture in which one substance consists of microscopically dispersed insoluble particles that are distributed throughout another substance.
- The particles in a colloid are larger than those in a solution, but smaller than those in a suspension.
Separating Colloidal Particles
- Centrifugation is a technique used to separate colloidal particles from a mixture.
Light Scattering in Colloids
- When a beam of light passes through a colloid, it scatters in all directions due to thepresence of dispersed particles, a phenomenon known as Tyndall effect.
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