Which of the following methods is used to separate the colloidal particles?

Correct option is D

Correct Answer: (d) Centrifugation

Explanation:
• Centrifugation is used to separate colloidal particles based on their size and density by spinning the mixture at high speed.
• The centrifugal force causes heavier colloidal particles to settle at the bottom, separating them from the liquid.

Information Booster:
• Colloids cannot be separated by ordinary filtration because their particles are too small.
• The process of centrifugation is commonly used in laboratories for separating blood components and milk cream.
• The apparatus used is called a centrifuge.
• This method is based on the principle of sedimentation by centrifugal force.
• It helps purify colloids by removing suspended impurities.

Additional Knowledge:
• Sedimentation – Separates heavier particles from liquids but not effective for colloids.
• Filtration – Used for suspensions, not for colloids as they pass through filter paper.
• Decantation – Removes clear liquid from settled solids but cannot separate colloidal particles.