Asked in PPSC, FPSC and other one-paper exams (compiled from unofficial resources).
Atoms, Elements & CompoundsSome Important Compounds
The gemstone ruby is actually _ with traces of some other elements.
- A.Aluminium OxideCorrect answer
- B.Silicon Dioxide
- C.Calcium Carbonate
- D.Ferric Oxide
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Practice these MCQs in the appQuick fact: The gemstone ruby is actually Aluminium Oxide (Al₂O₃) with traces of chromium, which gives it its characteristic red colour.