Which of the following processes involves abs | vedclass

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(B) The addition of the first electron to a neutral atom is generally exothermic (energy is released),as seen in options $A$,$C$,and $D$. However,when

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$O^{-}_{(g)} + e^{-} \rightarrow O^{2-}_{(g)}$

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(B) The addition of the first electron to a neutral atom is generally exothermic (energy is released),as seen in options $A$,$C$,and $D$. However,when an electron is added to a negatively charged ion,such as $O^{-}_{(g)}$,there is a strong electrostatic repulsion between the incoming electron and the existing negative charge. To overcome this repulsion,energy must be supplied to the system. Therefore,the process $O^{-}_{(g)} + e^{-} \rightarrow O^{2-}_{(g)}$ is endothermic and involves the absorption of energy.

Which of the following processes involves absorption of energy?

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Consider the following conversions:
$(i) \ O_{(g)} + e^- \to O^{-}_{(g)} ; \Delta H_1$
$(ii) \ F_{(g)} + e^- \to F^{-}_{(g)} ; \Delta H_2$
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$(iv) \ Na_{(g)} \to Na^{+}_{(g)} + e^- ; \Delta H_4$
Which of the following statements is incorrect?

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