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

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.

Q. "Lithium is the only alkali metal that form superoxides when heated in excess of air."
Answer whether the above statement is true or false.
If true enter 1, else enter 0.

Q.

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 $Fr{O}_2$. Reason: The larger alkali metal ions stabilities $O_2^{-}$ (superoxide).