Class 7 Science MCQs (Grade 7) From Textbook

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Class 7 Science Exam Prep: Certification Test 340

Sound and Vacuum Learning App & e-Book: MCQ 340

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MCQ: 340

We cannot hear alarm of a clock if there is

  1. vacuum in the jar
  2. air in the jar
  3. liquid in the jar
  4. solid in the jar
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7th Grade Science Quiz App (Android & iOS)

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