Considering the elements F,Cl,OandS, the correct order of their electron affinity values is:
A
F>Cl>O>S
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B
F>O>Cl>S
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C
Cl>F>S>O
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D
O>F>S>Cl
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Solution
The correct option is CCl>F>S>O ΔHkJmol−1→Cl=−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.