A) Gases like sulphur dioxide
B) Particulate matter of the size 5 micrometer or above
C) Gases like ozone and methane
D) Particulate matter of the size 2.5 micrometer or less
Correct Answer: A
Solution :
Scrubber is an electrostatic precipitator in which the dirty air is cleaned by capturing the gas like \[S{{O}_{2}}\] and other oxides in water/lime spray.
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