Question

Cottrell precipitator is used to *

(a) precipitate mud from muddy water.

(b) precipitate carbon particles from smoke.

(c) purify the ordinary drinking water.

(d) precipitate salts in qualitative analysis.​

Answer 1

Answer:

(b) precipitate carbon particles from smoke

Explanation:

Carbon particle is charged particles and can not be precipitated. Thus, a metal plate of an oppositely charged particle is used for their precipitation. This is done by the Cottrell smoke precipitator which neutralizes the charge on the carbon particles and neutralizes them.