The correct order of stability for the following superoxides is

Options

A. `KO_(2)gtRbO_(2)CsO_(2)`
B. `RbO_(2)gtCsO_(2)gtKO_(2)`
C. `CsO_(2)gtRbO_(2)gtKO_(2)`
D. `KO_(2)gtCsO_(2)gtRbO_(2)`

Answer

C

Explanation

With the increase in size of metal ion `K^(o+) lt Rb^(o+) lt Cs^(o+)`, compatibility with superoxide ion `(O_(2)^(Θ))`, increases, resulting in increase in lattice energy or stability of the peroxide formed.