Question

Centrifugation is used in those cases where filtration does not work due to the smaller size of soild particles

• A. True
• B. False

Answer 1

The correct option is A True

Different separation techniques are present depending on the property of the substances to be separated.

• Centrifugation is a separation technique which uses the principle "density difference of the components".
• When the mixture of components having different density, rotated (or spun) using a centrifugal machine the denser particles forced to move outward and lighter particles to move to the center.
• Milk is a colloid, where the fat globules are dispersed in the medium (water).
• We can separate cream from milk using centrifugation technique.
• The particles which are small in size (i.e which can not separate using ordinary filter paper) separated using this process.
• A simple centrifuge (in the laboratory) has a vertical shaft carrying four or more test tube holders where the mixture is put for rotation.
• The centrifugal force acts on the particles and forced heavier particles to move radially outward and lighter particles to move to the center..
• The smaller particles which can not be separated using filter paper, are taken for centrifugal separation.This category of substances include colloids mainly.

Therefore, the given statement is true, i.e., centrifugation is used in those cases where filtration does not work due to the smaller size of the particles.