Chapter 14: Class 7 Science Exam Tests
Class 7 Science MCQs - Chapter 14
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MCQ 66: As the water evaporates, due to cold air it
MCQ 67: Hot water is bad for fish eggs to
MCQ 68: At treatment plant, raw water is mixed with alum and lime, it is called
MCQ 69: The average amount of water which a large deciduous tree takes, is
MCQ 70: The water in ponds, lakes, streams and rivers is called fresh water because it is
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