A) oxygen is more electronegative
B) oxygen has high electron affinity
C) \[{{O}^{-}}\]ion will tend to resist the addition of another electron
D) \[{{O}^{-}}\]ion has comparatively larger size than oxygen atom
Correct Answer: C
Solution :
\[{{O}^{-}}(g)+{{e}^{-}}\xrightarrow[{}]{{}}{{O}^{2-}}(g),\]\[\Delta {{H}^{o}}=844\,KJ\,mo{{l}^{-1}}\] This process is unfavourable in the gas phase because the resulting increase in electron-electron repulsion over weighs the stability gained by achieving the noble gas configuration.You need to login to perform this action.
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