JEE Main Chemistry question

Which of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for C, Ca, Al, F and O?

(A)
(B)
(C)
(D)Correct

Answer: (D)

Solution

Ca (alkaline earth metal, stable ) has a near-zero/least negative electron gain enthalpy. Al (group 13) is next least negative. Across period 2, electron gain enthalpy

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Question ID VK-133853