One reason on heating in excess supply of air K, Rb and Cs from superoxide on preference to oxide and peroxides?

One reason on heating in excess supply of air K, Rb and Cs from supero

1.	One reason on heating in excess supply of air K, Rb and Cs from superoxide on preference to oxide and peroxides?
Answer» Solution :K, Rb and Cs are more reactive therefore, they form superoxide in preference to oxides and PEROXIDES `K^(+), Rb^(+)` and `Cs^(+)` ions are large cations and SUPEROXIDES ion `O_(2)^(-)` is also large. LARGER cations STABILIZE larger anions, therefore, they form superoxide.