Environmental Chemistry II Water Multiple Choice Questions and Answers 2 PDF Download
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MCQ on Environmental Chemistry II Water Worksheets 2 Quiz PDF Download
MCQ: What percentage of fresh water is available to man?
- None of these
MCQ: What is second step of raw water treatment?
MCQ: What is percentage of water from rivers and lakes?
MCQ: Permanent hardness of water is caused due to presence of dissolved
- Calcium hydrogen carbonates
- Magnesium hydrogen carbonates
- Both A and B
- Sulphates and chlorides of calcium or magnesium
MCQ: Step of sewage water treatment in which there is some aeration and organic material is converted to inorganic materials is called
- Primary sewage treatment
- Secondary sewage treatment
- Activated sludge treatment