1.
During agitation of liquids, the

2.
Filter aids like asbestos, kieselguhr, diatomaceous earth etc. are used to increase the porosity of the final filter cake & reducing the cake resistance during filtration. Filter aid is

3.
According to Bond crushing law, the work required to form particle of size 'D' from very large feed is (where $${\left( {\frac{{\text{S}}}{{\text{V}}}} \right)_{\text{p}}}$$ and $${\left( {\frac{{\text{S}}}{{\text{V}}}} \right)_{\text{f}}}$$ are surface to volume ratio of the product and feed respectively).

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