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STD 12 - 8. microbes in human welfare — Biology STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceBiologySTD 12 - 8. microbes in human welfare1 Mark
MCQ
In a sewage treatment plant, primary treatment is
  • A
    Physical process which involves sedimentation only
  • ✓
    Physical process which involves both filtration and sedimentation
  • C
    Biological process which involves formation of primary sludge and effluent
  • D
    Biological process which involves both filtration and sedimentation
✓

Answer

Correct option: B.
Physical process which involves both filtration and sedimentation
b
Primary treatment of sewage involves physical process i.e. filtration and sedimentation.

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