Environmental Chemistry II Water Multiple Choice Questions and Answers 9 PDF Download
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MCQ on Environmental Chemistry II Water Worksheets 9 Quiz PDF Download
MCQ: Third step of sewage water treatment is called
- Primary sewage treatment
- Secondary sewage treatment
- Activated sludge treatment
MCQ: Water that gives little lather is called
- Hard water
- Soft water
- Dirty water
- Clean water
MCQ: Water exists in how many different states on Earth?
MCQ: What is percentage of water from oceans?
MCQ: Hardness which can be removed by boiling is called
- permanent hardness
- temporary hardness