Question

Electron affinity of element is in the order
a. F> CI > OI b. F>ON > CI
c. CI > F > Br>I d. Br>I> CI >F​

Answer 1

option A

Variation of electron gain enthalpy in periodic table -

Electron gain enthalpy decreases down the group.

generally, electron gains enthalpy increases (more negative) along the period.

The correct order of electron affinity is Cl > F > O

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Answer 2

Explanation:

Electron affinity of Cl is greater than fluorine so the order is as, F<Cl<Br<I