Chapter 14: Class 7 Science Exam Tests
Class 7 Science MCQs - Chapter 14
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MCQ 6: Desalination plant is very expensive because it
MCQ 7: When algae grows on the surface of water, it prevents
MCQ 8: The percentage of salty water is
MCQ 9: As compare to hose for car washing, bucketing uses
MCQ 10: The poison gets more concentrated as it moves through
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