JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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The process requiring the absorption of energy is

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Correct option: C

{O^ - } \to {O^{2 - }}

The correct answer is C (

{O^ - } \to {O^{2 - }}

) because adding an electron to an already negatively charged ion requires energy due to electron-electron repulsion.

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\mathrm{O}, \mathrm{O}^{2-}, \mathrm{F}

\mathrm{F}^{-}