Igneous Rocks Learning App (Android & iOS) | Class 8 Science MCQs e-Book PDF

Class 8 Science MCQs (Grade 8) From Textbook

Class 8 Science MCQs – Certification Test 18

Igneous Rocks MCQs (Question 18) – App & e-Book Download

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MCQ 18: Obsidian is rich in:

  1. silica
  2. iron
  3. cobalt
  4. calcium

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