Class 7 Science Tests
Water Treatment MCQ Quiz PDF Download
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Class 7 Science: Water Treatment MCQs PDF Download
MCQ: Fluoride is also added to water, which helps in preventing
MCQ: The tanks that supply water to towns are built at
MCQ: An addition of small dose of chlorine gas to the filtered water is known as
MCQ: The process in which water is passed through filter beds of sand and gravel to remove smaller particles of dust is called
MCQ: Huge strainers are used to
Practice Tests: Class 7 Science Exam Prep
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