AP EAMCET · Chemistry · s Block Elements
Assertion (A) K, Rb and Cs form superoxides.
Reason (R) The stability of the superoxides increases from ' \(\mathrm{K}\) ' to ' \(\mathrm{Cs}\) ' due to decrease in lattice energy.
The correct answer is
- A Both (A) and (R) are true and (R) is the correct explanation of (A)
- B Both (A) and (R) are true but (R) is not the
correct explanation of (A) - C (A) is true but (R) is not true
- D (A) is not true but (R) is true
Answer & Solution
Correct Answer
(C) (A) is true but (R) is not true
Step-by-step Solution
Detailed explanation
Superoxides are the species having an \(\mathrm{O}-\mathrm{O}\) bond and \(\mathrm{O}\) in an oxidation state of \(-\frac{1}{2}\) (superoxide ion is \(\mathrm{O}_2^{-}\)). Usually these are formed by active metals such as \(\mathrm{KO}_2, \mathrm{RbO}_2\) and \(\mathrm{CsO}_2\).…
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