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Question

Considering the elements $F, C l, O a n d S,$ the correct order of their electron affinity values is:

F > C l > O > S

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F > O > C l > S

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C l > F > S > O

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O > F > S > C l

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Solution

The correct option is C $C l > F > S > O$
$Δ H k J m o l^{- 1} \to C l = - 349; F = - 328; S = - 200; O = - 141$
Due to small sizes of F and O, EA value is less than expected.
$∴$ Option C is correct.

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