1. Tardigrade
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  4. Assertion: Generally alkali and alkaline earth metals form superoxides. Reason: There is a single bond between O and O in superoxides.

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Q. Assertion: Generally alkali and alkaline earth metals form superoxides.
Reason: There is a single bond between O and O in superoxides.

AIIMSAIIMS 2016The s-Block Elements

Solution:

Only K, Rb and Cs from alkali metals form superoxides and superoxides possess three electron bond

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