Chapter 24: Class 7 Science Exam Tests
Class 7 Science MCQs - Chapter 24
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MCQ 81: If we put our ear by the wall, we will
MCQ 82: Short waves have
MCQ 83: Musical sounds are organized into
MCQ 84: If frequency of sound wave is 100 Hz, it will send
MCQ 85: As we turn older, our ears get
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