Energy is released in the following process

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Na(g) → ) Na+(g) + e

O-(g) + e → O-2(g)

O(g) +e → O- (g)

N-2(g) + e →N-3(g)

answer is C.

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Detailed Solution

(1) IP….endothermic ;(2) , (4)…..repulsions between negative charge and added electron…endothermic ;(3)…..Electron gain enthalpy…..exothermic ;

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