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Class 7 Science MCQs (Grade 7) From Textbook

Class 7 Science MCQs – Certification Test 356

Water Treatment Quiz (Question 356) – Study App & e-Book Download

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MCQ 356: The process in which water is passed through filter beds of sand and gravel to remove smaller particles of dust is called:

  1. coagulation
  2. sedimentation
  3. filtration
  4. chlorination

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