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Applications of Colloids

How does the ...

Question

How does the precipitation of colloidal smoke take place in the Cottrell precipitator?

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Solution

Charged smoke particles are passed through a chamber containing plates with charge opposite to that of smoke particles, in the Cottrell precipitator. On contact with the plates, the particles lose their charge and get precipitated.

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Q. Smoke is colloidal solution of solid particles such as Carbon, arsenic compoundsdust, etc. in air. Precipitation of smoke particles coming form thechimney of factories is carried out by Cottrel Precipitator and Carbon freeair passes out through the chimney.(a) Name the principle used in the Cottrel Precipitator.(b) How smoke precepitator causes precipitation and settling of smokeparticles.

(c) Name the value learnt by the use of this Cottrel Precipitator

Q. Cottrell smoke precipitator works on the principle of:

Q. Which of the following statements are correct?
(i) When an animal hide, which has negatively charged particles, is soaked in tannin, which contains positively charged colloidal particles, mutual coagulation does not take place.
(ii) Photographic films are prepared by coating an emulsion of the light sensitive silver bromide in gelatin over glass plates or celluloid films.
(iii) Latex is a colloidal solution of rubber particles which are negatively charged.
(iv) In Cottrell precipitator, the smoke, before it comes out from the chimney, is led through a chamber containing plates having a charge opposite to that carried by smoke particles. The particles on coming in contact with these plates acquire some charge and do not get precipitated.

Cottrell precipitator works on the principle of

Cottrell Precipitator Acts On Which Of The Following Principle?

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Applications of Colloids

Standard XII Chemistry

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