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Assertion . K , Rb and Cs form superoxid...

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

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If the assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
C
The size of superoxide `(O_(2)^(-))` ion is bigger than oxide `(O_(2)^(-))` ion. So as we go down the group due to increase in ionic radius, stability of superoxide also increases.
Hence reason is not the correct explanation of assertion (which is correct).
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