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The particles which are larger than the filter pores are removed by ________

(a) Inertial Impaction

(b) Diffusion

(c) Electrostatic attraction

(d) Interception

I got this question in examination.

The doubt is from Filter Sterilization in section Sterilization of Fermentation Technology

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Right answer is (d) Interception

For explanation I would say: The particles which are larger than the filter pores are removed by direct interception. Even if there are smaller particles, they are also retained by interception. It is an important mechanism in the filtration of gases as well as the filtration of liquids.

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