Class 10 Chemistry MCQs - Chapter 7
Environmental Chemistry II Water Quiz Questions & Answers PDF Download - 7
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Environmental Chemistry II Water Exam Questions and Answers PDF Download: Test 7
Process in which water is filtered through sand and gravel is called
- sedimentation
- coagulation
- filtration
- chlorination
How many basic steps are involved in raw water treatment?
- three
- four
- five
- six
Natural water is
- pure
- impure
- non distilled
- distilled
Addition of washing soda removes
- softness of water
- temporary hardness of water
- permanent hardness of water
- hydrogen from water
The first step of sewage water treatment is called
- primary sewage treatment
- secondary sewage treatment
- activated sludge treatment
- chlorination
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