Verified Solution • 2025–26 Session
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QJEEM20Ch11a3: JEE Main 2020 Chemistry - Class 11 JEEM20Ch11a3 Solution: Within each pair of elements F & Cl, S & Se, and Li & Na,…
Within each pair of elements F & Cl, S & Se, and Li & Na, respectively, the elements that release more energy upon and electron gain are :
Multiple Choice Options
- A F, S and Li
- B Cl, Se and Na
- C Cl, S and Li
- D F, Se and Na
Step-by-Step Verified Solution
Electron affinity of second period p-block element is less than third period p-block element due to small size of second period p-block element.
Electron affinity order : F < Cl
Down the group electron affinity decreases due to size increases.
Electron affinity E.A. order : S > Se
Li > Na
Electron affinity order : F < Cl
Down the group electron affinity decreases due to size increases.
Electron affinity E.A. order : S > Se
Li > Na