Assertion (A): K ,   Rb and Cs form superoxides Reason (R): The stability of superoxides increases form…

Assertion (A): K, Rb and Cs form superoxides
Reason (R): The stability of superoxides increases form K to Cs due to decrease in lattice energy.
  1. Both A and R are true and R is a correct explanation for A
  2. Both A and R are true but R is not a correct explanation for A
  3. A is true, R is false
  4. A is false, R is true

Solution

K, Rb, Cs form superoxides when they are burnt in the air.

As we down the group then the size of atom from K to Cs increases so that the lattice energy decreases hence the stability of superoxide also decreases.

Asked in: AP EAMCET 2021 (19 Aug Shift 1)

Practice more s Block Elements questions on Aicharya