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GK QUESTION#3530

Which of the following is the formula of barium peroxide.

  1. ABa₂O₂
  2. BBaSO₄
  3. CBa
  4. DBaO₂Correct answer
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Answer

D. BaO₂

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Explanation

Barium peroxide has formula BaO₂. It contains Ba²⁺ and the peroxide ion O₂²⁻, so one barium ion balances one peroxide ion. Barium oxide, BaO, and barium sulfate, BaSO₄, are different compounds.

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