JEE CHEMISTRY MCQ: STRUCTURE OF ATOM

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The electronic configurations of four elements are given below. Arrange these elements in the correct order of the magnitude (without sign) of their electron affinity.

XI.\,2{s^2}2{p^5}

XII.\,\,3{s^2}3{p^5}

XIII.\,\,2{s^2}2{p^4}

XIV.\,\,3{s^2}3{p^4}

Select the correct answer using the codes given below

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Correct option: D

(iii)<(iv)<(i)<(ii)

Option D (iii)<(iv)<(i)<(ii) is correct because electron affinity increases across a period and decreases down a group, with exceptions due to small size.

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