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

Options

A. If both (A) and (R) are correct and (R) is the correct explanation of (A).
B. If both (A) and (R) are correct, but (R) is not the correct explanation of (A).
C. If (A) is correct, but (R) is incorrect.
D. If both (A) and (R) are incorrect.

Answer

C

Explanation

Since for salts of larger anions, the lattice energy increases with increase in the size of the cation from `K^(+)` to `Cs^(+)`, therefore, the stability of their superoxides increases from K to Cs.