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JEE Advanced2020Chemistrys Block ElementsActual

Which of the following liberates O 2 upon hydrolysis?

Options

  1. APb 3 O 4
  2. BKO 2
  3. CNa 2 O 2
  4. DLi 2 O 2

Correct answer

B. KO 2

Step-by-step solution

A Pb 3 O 4 + H 2 O → No reaction ( B ) 2 KO 2 + 2 H 2 O → 2 KOH + H 2 O 2 + O 2 ( C ) Na 2 O 2 + 2 H 2 O → 2 NaOH + H 2 O 2 ( D ) Li 2 O 2 + 2 H 2 O → 2 LOH + H 2 O 2

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