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The correct order of electron affinity is - [JEE-Main On line-2018]

1. O > F > Cl
2. F > O > Cl
3. F > Cl > O
4. Cl > F > O

Correct answer: Cl > F > O

Solution

Chlorine has the highest electron affinity among the three elements due to its effective nuclear charge and smaller atomic radius, which allows it to attract additional electrons more readily than fluorine and oxygen.

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