The cotterells precipittor is used to :

Options

A. neutralise charge on carbon particles in air in smoke
B. coagulate carbon atoms of smoke
C. bring in cataphorests in carbon particles
D. all of these

Answer

D

Explanation

The negatively charged carbon particles in aire (smoke ) are moved towards anode due to cataphoresis , where they are neutralised to left free air . The process is used to control air pollution .