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Q.

The basic principle of Cottrell's precipitator is

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a

Neutralisation of charge on colloidal particles 

b

Scattering of light

c

Le-chatelier's principle

d

Peptization(20000 to 70000 V)

answer is A.

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Detailed Solution

In Cottrell smoke precipitator, the smoke is allowed to pass through a chamber having a series of plates charged to very high potential  (20000 to 70000 V )  Charged particles of smoke get attracted by charged plates and the gases coming out of chimney precipitated .become free of charged particles.

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