Metals Learning App | Class 9 Chemistry Quiz e-Book PDF

Class 9 Chemistry MCQs (Grade 9) From Textbook

Class 9 Chemistry MCQs – Certification Test 28

Metals Quiz (Question 28) – App & e-Book Download

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MCQ 28: On contact with oxygen, Rubidium forms:

  1. normal oxide
  2. per oxide
  3. super oxide
  4. trioxide

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