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NEST2023Chemistrys Block Elements

The reaction of the alkali metals with oxygen results in the formation of different alkali metal oxides, monoxides, peroxides and superoxides. These oxides have interesting chemical properties and applications. The ease of formation and stability of these oxides depend mainly on the charge and size of the alkali metals in relation to the size of the anions. In an application like in a space suit, a chemical may be us

Options

  1. AThe order of the stability of alkali metal monoxides is Li ₂ O Na ₂ O K ₂ O .
  2. BSuperoxide formation decreases down the group.
  3. CNa ₂ O ₂ on reaction with CO ₂ gives Na ₂ CO ₃ and itself gets oxidized to oxygen.
  4. DPotassium superoxide can be used in a space suit.

Correct answer

D. Potassium superoxide can be used in a space suit.

Step-by-step solution

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