Match List–I with List–II. List - I List - II (P) O ( g ) + e − → O − ( g ) (1) Positive Electron gain enthalpy (Q) O − ( g ) + e − → O 2 − ( g ) (2) Negative Electron gain enthalpy (R) Na − ( g ) → N

Question

Match List–I with List–II. List - I List - II (P) O ( g ) + e − → O − ( g ) (1) Positive Electron gain enthalpy (Q) O − ( g ) + e − → O 2 − ( g ) (2) Negative Electron gain enthalpy (R) Na − ( g ) → Na ( g ) + e − (3) Exothermic (S) Mg + ( g ) + e − ⟶ Mg ( g ) (4) Endothermic

TestHub · Accepted Answer

(P) O ( g ) + e − → O − ( g ) Δ H = − ve (Q) O − ( g ) + e − → O 2 − ( g ) Δ H = + ve ( R ) Na − ( g ) → Na ( g ) + e − Δ H = + ve (S) Mg + ( g ) + e − ⟶ Mg ( g ) Δ H = − ve

List - I	List - II
(P) $O (g) + e^{-} \to O^{-} (g)$	(1) Positive Electron gain enthalpy
(Q) $O^{-} (g) + e^{-} \to O^{2 -} (g)$	(2) Negative Electron gain enthalpy
(R) $Na^{-} (g) \to Na (g) + e^{-}$	(3) Exothermic
(S) $Mg^{+} (g) + e^{-} ⟶ Mg (g)$	(4) Endothermic

Chemistry - PERIODIC TABLE Question with Solution | TestHub

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JEE Main (2028)

JEE Main + Advanced (1 year 12th class)