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KCET2014ChemistrySolutions

A metallic oxide reacts with water to form its hydroxide, hydrogen peroxide and also liberates oxygen. The metallic oxide could be

Options

  1. A( O K O ₂ )
  2. B( Na ₂ O ₂ )
  3. C( CaO )
  4. D( Li ₂ O )

Correct answer

A. ( O K O ₂ )

Step-by-step solution

Potassium Superoxide react with water to produce potassium hydroxide, hydrogen peroxide and oxygen. This reaction takes place at a temperature near ( 0^ C ). Whereas, other metal oxide reacts with water but does not produce peroxide. ( 2 KO ₂+2 H ₂ O 2 KOH + H ₂ O ₂+ O ₂ ) Reaction of other metal ( Na ₂ O ₂+2 H ₂ O 4 NaOH (a q)+ O ₂(g) ) ( CaO + H ₂ O Ca ( OH )₂ ) ( Li ₂ O + H ₂ O 2 LiOH )

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