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Overview of General Metallurgical Processes

Name the alka...

Question

Name the alkali metal which forms superoxide when heated in excess of air.

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Solution

The three alkali metals are potassium (K) , rubidium(Rb) and caesium (Cs) which form super oxides when heated in excess of air.

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Q. When there is excessive oxygen why sodium forms peroxide and others forms superoxide in alkali metals why?

Q. A metal on combustion in air vigorously forms a superoxide X . Name the metal.

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Answer whether the above statement is true or false.
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Which one of the alkali metals, forms normal oxide $M_{2} O$ on heating in excess of air?

Q. Assertion :Fr burns in air forming

F r O_{2}

. Reason: The larger alkali metal ions stabilities

O_{2}^{-}

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