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Inventions MCQs – Certification Test 706

helium MCQs (Question 706) – Learning App & e-Book Download

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MCQ 706: The process to extract helium from natural gas was invented by:

  1. Sir Henry Ruttan
  2. Sir John Cunningham McLennan
  3. Dr Larry wang
  4. Sir George Beers
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8th Class Science Test Questions

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