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Class 7 Science MCQs (Grade 7) From Textbook

Class 7 Science MCQs – Certification Test 753

Sound and Vacuum Trivia (Question 753) – Learning App & e-Book Download

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MCQ 753: An example to demonstrate the effect of sound in vacuum is:

  1. vacuum bell jar
  2. simple bell jar
  3. air pump and ring
  4. air pump and clock
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Sound and Vacuum Trivia App & e-Book – Class 7 Science Exam Prep

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Sound and Vacuum Trivia App

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