Easy Tutorial
For Competitive Exams
☰
Aptitude
TNPSC G4
10th CBSE Maths
Aptitude
Quantitative Aptitude
33 Lessons
Aptitude - All
166 Tests
185 Lessons
9 Videos
Shortcuts
23 Lessons
Exams
TNPSC G4
400 Tests
200 Lessons
160 Videos
10th CBSE Maths
20 Videos
AMCAT
13 Tests
9 Videos
Placement Papers
31 Tests
3 Videos
All Exams
1633 Tests
1165 Lessons
872 Videos
More ..
Puzzles
118 Lessons
GK English
41 Tests
2 Lessons
Test Series - All Exams
437 Tests
5 Videos
Home
NEET - Biology
Microbes in Human Welfare Practice Q & A
Q:9
Secondary sewage treatment is mainly a
Biological process
Physical process
Mechanical process
Chemical process
Check Answer
Next Question
Ethanol is commercially produced through a particular species of
Check Answer
Important Links
Popular Videos
More Videos
EasyTutorial Youtube Channel
Share with Friends
