Question

Cotrell precipitator works on the principle of:

• A. distribution law
• B. addition of electrolyte
• C. neutralisation of charge on colloids
• D. Le Chatelier's principle

Answer 1

The correct option is C neutralisation of charge on colloids

Smoke coming out of the chimney in industrial area is a nuisance and health hazard. It is a colloidal particles which are charged particles and thus they are removed from fuel gases by electrical precipitation (Cottrell Precipitator) which involves neutralisation of charged colloidal particles present in the smoke.