Class 7 Science Learning App Download | Compound Formation MCQs e-Book PDF
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Class 7 Science MCQs – Certification Test 494

Compound Formation MCQs (Question 494) – Learning App & e-Book Download

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MCQ 494: Nitric acid is combined with oxygen to produce brown fume of:

  1. nitrogen oxide
  2. nitrogen dioxide
  3. carbon dioxide
  4. nitrogen
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