JEE Main 2018 — Classification of Elements and Periodicity in Properties Question with Solution
JEE Main 2018 (15 Apr Shift 2 Online)
Question
The correct order of electron affinity is:
Choose an option
Show full solutionCorrect option: D
Correct answer
D
Step-by-step explanation
On moving from left to right across a period, the electron affinity becomes more negative. On moving from top to bottom in a group, the electron affinity becomes less negative.
Chlorine has more negative electron affinity than fluorine, Because adding an electron to fluorine ( orbital) causes greater repulsion than adding an electron to chlorine orbital) which is larger in size.
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This is a previous-year question from JEE Main 2018, covering the Classification of Elements and Periodicity in Properties chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.