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MHT CET Medical202626 April 2026Morning ShiftChemistrys Block ElementsActual

Identify the oxide used as CO ₂ adsorbent and oxygen generator from following.

Options

  1. ANa ₂ O
  2. BNa ₂ O ₂
  3. CK ₂ O
  4. DKO ₂

Correct answer

D. KO ₂

Step-by-step solution

Potassium superoxide ( KO ₂ ) is widely used as a CO ₂ adsorbent and oxygen generator in space capsules, submarines, and breathing masks. The reaction involved is: 4 KO ₂ + 2 CO ₂ 2 K ₂ CO ₃ + 3 O ₂ Through this reaction, it absorbs carbon dioxide and releases oxygen gas. Answer: KO ₂

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