Question bank/JEE Main/Chemistry

Select equation having exothermic step

AS^- (g) + e^- (g) [IMAGE] S^2- (g)BNe (g) + e^- (g) [IMAGE] Ne^- (g)CN (g) + e^- (g) [IMAGE] N^- (g)DAl^+ (g)[IMAGE] Al (g) - e^- (g)

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[IMAGE] H_e.g.= (+) ve because of electrostatic repulsion.
(2) Ne (g) + e^-(g)[IMAGE] Ne^-(g) H_e.g.= (+) vebecause of stable completely
filled electron configuration
(+) ve because of stable half filled electron configuration.
= (-) ve because of the addition of electron to cation.

Source: Grass-G / CH-05 Chemistry Paper 10 October.docx