Class 10 Courses

Class 10 Chemistry App's Tests

Class 10 Chemistry e-Book's MCQs - Complete

Water Pollution Quiz App Free Download & e-Book - 388

MCQ:

The second step of sewage water treatment is called

  1. primary sewage treatment
  2. secondary sewage treatment
  3. activated sludge treatment
  4. chlorination

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Water Pollution App (Android & iOS)

Water Pollution App (Android & iOS)

10th Grade Chemistry App (Android & iOS)

10th Grade Chemistry App (iOS & Android)

O Level Chemistry App (Android & iOS)

O Level Chemistry App (Android & iOS)

A level Chemistry App (Android & iOS)

A level Chemistry App (iOS & Android)