Paper: CSIR-NET June 2021 · Subject: Inorganic Chemistry · Chapter: Main Group Elements · Topic: Main Group Elements – General · Marks: 2 · Difficulty: Hard
The correct order of the electron affinity for one-electron gain of the elements is
(a)$\mathrm{F}>\mathrm{Cl}>\mathrm{Br}$
(b)P $>$ N $>$ As
(c)$\mathrm{S}>\mathrm{Se}>\mathrm{O}$
(d)$\mathrm{K}>\mathrm{Li}>\mathrm{Na}$
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
Electron affinity: S > Se > O (O is anomalously low); Cl > F > Br, so (a) is wrong (c).