Question

The correct order of stability of the superoxides is

• A. $KO _{2}> RbO _{2}> CsO _{2}$
• B. $KO _{2}> CsO _{2}> RbO _{2}$
• C. $CsO _{2}> RbO _{2}> KO _{2}$
• D. $RbO _{2}> CsO _{2}> KO _{2}$

Answer 1

Answer: (C)

$CsO _{2}> RbO _{2}> KO _{2}$

Answer 2

Stability of superoxides increases with increase in size and electropositivity of the metal. Hence, the order is $CsO_2 > RbO_2 > KO_2.$