FE Civil Engineering Exam Prep

Category - Civil Engineering

Which of the following compounds is classified as a metallic oxide?
  1. H2O
  2. Na2O
  3. CO2
  4. NO2
  5. SO2
Explanation
Answer: Na2O

Metallic oxides consist of an oxygen atom bound to a metal. The only metal present in this question is sodium, so Na2O must be a metallic oxide.
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