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Chemistry Classification of Elements and Periodicity HARD Single Correct MCQ
Published on: August 12, 2026

Arrange and in ascending order of electron affinity

A
Se < S < O
B
Se < O < S
C
S < O < Se
D
S < Se < O

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The correct answer is:
A

Correct order of electron affinity is Se < S < O . In a group electron affinity decreases with increase in atomic number.

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