Assertion: K, Rb and Cs form superoxides. Reason: The stability of the superoxides increases from 'K' to 'Cs' due to decrease in lattice energy.

Assertion: K, Rb and Cs form superoxides. Reason: The stability of th

1.	Assertion: K, Rb and Cs form superoxides. Reason: The stability of the superoxides increases from 'K' to 'Cs' due to decrease in lattice energy.
Answer» If both assertion and Reason are true and the Reason is the correct explanation of the assertion. If both assertion and Reason are true but the reason is not the correct explanation of the assertion If assertion is true but reason is false If both assertion and reason are false. Solution :Superoxides are the species having an O-O bond and O in an OXIDATION state of `-(1)/(2)` (superoxide ION is `O_(2)^(-)`), Usually these are formed by active metals such as `KO_(2),RbO_(2)` and `CsO_(2)`. For the salts of larger anions (like `O_(2)^(-)`), lattice energy increases in a group. since, lattice energy is the DRIVING force for the formation of an ionic compound and its stability the stability of the superoxides from 'K' to 'Cs' also increases.