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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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Which of the following processes involves absorption of energy?

If the electron affinity of an element $M$ is $x \ kJ/mol$,then the ionisation potential of this element is:

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Which of the following processes involves absorption of energy?

Similar Questions

Which of the following processes involves absorption of energy?

If the electron affinity of an element $M$ is $x \ kJ/mol$,then the ionisation potential of this element is:

When the first electron gain enthalpy $(\Delta _{eg}H)$ of oxygen is $-141 \ kJ/mol,$ its second electron gain enthalpy is

Identify the element having positive electron gain enthalpy.

Given below are two statements:Statement $I$: Fluorine has most negative electron gain enthalpy in its group.Statement $II$: Oxygen has least negative electron gain enthalpy in its group.In the light of the above statements,choose the most appropriate from the options given below.

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Given below are two statements:
Statement $I$: Fluorine has most negative electron gain enthalpy in its group.
Statement $II$: Oxygen has least negative electron gain enthalpy in its group.
In the light of the above statements,choose the most appropriate from the options given below.