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Class 7 Science MCQs – Certification Test 1310

Sound and Vacuum MCQs (Question 1310) – Learning App & e-Book Download

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MCQ 1310: We can hear the voice of alarm clock when there is:

  1. vacuum in the jar
  2. air in the jar
  3. liquid in the jar
  4. space in the jar
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Sound and Vacuum MCQs App & e-Book – Class 7 Science Exam Prep

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