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Question

______ is a device for separation of pollutants from air.
  1. Autoclave
  2. Distillator
  3. Scrubber
  4. Electronic precipitator

A
Autoclave
B
Distillator
C
Electronic precipitator
D
Scrubber
Solution
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There are several contaminants found in air. It is very important to purify this polluted air .A fine spray of water in a device known as scrubber can effectively separate many gases such as ammonia and sulphur dioxide.

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