JEE Main Chemistry question

Not in JEE Main or NEET syllabus

Which of the following statements about control of particulate pollution is false?

(A)Gravity settling chamber removes larger particles from the air.
(B)Cyclone collector removes fine particles in the diameter range 5-20 microns.
(C)Wet scrubbers are used to wash away all types of particulates.
(D)In electrostatic precipitator, the particulates are made to acquire positive charge and are then attracted by the negative electrode and removed.Correct

Answer: (D)

Solution

In an electrostatic precipitator, particulates are actually given a negative charge by a corona discharge and are then attracted to a positively charged collecting electrode — the reverse

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Question ID VK-141983