Which of the following statement is INCORRECT about given processes ?
O(g) + e⁻ → O⁻(g) Process-1
O⁻(g) + e⁻ → O²⁻(g) Process-2
N(g) + e⁻ → N⁻(g) Process-3
N⁻(g) + e⁻ → N²⁻(g) Process-4

Question

Which of the following statement is INCORRECT about given processes ?

O(g) + e⁻ → O⁻(g) Process-1

O⁻(g) + e⁻ → O²⁻(g) Process-2

N(g) + e⁻ → N⁻(g) Process-3

N⁻(g) + e⁻ → N²⁻(g) Process-4

TestHub · Accepted Answer

The first electron gain enthalpy (Process 1 and 3) is generally exothermic for oxygen and nitrogen. The second electron gain enthalpy (Process 2 and 4) is always endothermic due to electrostatic repulsion. Thus, Process (3) is exothermic and Process (4) is endothermic, making option D correct.

Chemistry - PERIODIC TABLE Question with Solution | TestHub

Options:

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