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  • Waste Water Story-I
  • Which instrument is used to bubble air while treated the ...
Multiple choice

Which instrument is used to bubble air while treated the polluted water?

  1. Filter

  2. Aerator

  3. Crift

  4. Distillation flask

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Aerator is used to add oxygen to polluted water.

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