The electron affinity values (in kJ mol⁻¹) of three halogens X, Y and Z are respectively -349, -333 and -325. Then X, Y and Z respectively, are [DCE 2008]

JEE Main Chemistry question

The electron affinity values (in kJ mol⁻¹) of three halogens and are respectively and . Then and respectively, are [DCE 2008]

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

Answer: (B)

Solution

Among the halogens, chlorine has the highest-magnitude electron affinity (≈ −349 kJ/mol), exceeding fluorine's (≈ −328 to −333 kJ/mol, depending on source) due to fluorine's small size causing extra electron repulsion, while bromine's is

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Question ID VK-133184