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Difficulty: MediumSublimation, Magnetization, and Centrifugation

A fine suspension of micro-solid particles in a liquid medium passes through filter paper very slowly because the particles clog the pores. Which physical technique utilizes high-speed spinning to force the denser solid particles to settle rapidly at the bottom of the container?

  1. CentrifugationAnswer
  2. B
    Sublimation
  3. C
    Fractional distillation
  4. D
    Magnetization

Answer

Centrifugation is the technique that uses high-speed rotation and centrifugal force to rapidly separate suspended solids from liquids based on density differences.
Centrifugation is specifically designed for separating fine solid suspensions in liquids when standard filtration is too slow or ineffective. Spinning the mixture at high speed exerts centrifugal force, driving denser suspended particles rapidly to the bottom.

Step-by-Step Solution

1
Analyze the physical properties of the mixture described in the stem.
The mixture consists of micro-solid particles suspended in a liquid medium that clog filter paper.
Identifying that filtration is ineffective due to pore clogging narrows down the required physical separation method.
2
Evaluate the mechanism of centrifugation.
High-speed spinning creates outward centrifugal force that forces heavier suspended particles to settle to the bottom as a pellet, leaving clear liquid supernatant.
Centrifugation relies on density differences between suspended solid particles and the liquid phase without heat or chemical modification.

Key Concept

Centrifugation and separation of suspensions
Estimated Time:1m 0s
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Topics

Sublimation, Magnetization, and Centrifugation