Chapter 14: Class 7 Science Exam Tests
Class 7 Science MCQs - Chapter 14
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MCQ 11: In our body, percentage of water is
MCQ 12: An addition of small dose of chlorine gas to the filtered water is known as
MCQ 13: Skin diseases, eye infections and diarrhea are the examples of
MCQ 14: The process in which water is passed through filter beds of sand and gravel to remove smaller particles of dust is called
MCQ 15: The sea which joins the ocean is
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