JEE Main Chemistry question

Statement 1: The electron attachment enthalpy of fluorine is more negative than that of chlorine. Statement 2: All alkaline earth and noble gas elements have a positive value of electron attachment enthalpy.

(A)Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1
(B)Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
(C)Statement 1 is True, Statement 2 is False
(D)Statement 1 is False, Statement 2 is TrueCorrect

Answer: (D)

Solution

Statement 1 is false: chlorine actually has a more negative (more favourable) electron attachment enthalpy than fluorine, because fluorine's very small 2p orbital causes strong electron-electron repulsion when accepting an extra electron, reducing the energy released compared to the larger, less congested 3p orbital

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Question ID VK-133311