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3. Classification of elements and periodicity in properties — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry3. Classification of elements and periodicity in properties1 Mark
MCQ
Correct electron affinity order is
  • A
    $O < N < Cl < S$
  • ✓
    $N < O < S < Cl$
  • C
    $Cl > O > S > N$
  • D
    $N = Cl > O = S$
✓

Answer

Correct option: B.
$N < O < S < Cl$
b
Electron affinity is the tendency is attract shared pair of electron towards itself. Its value decreases in a group and increases in a period. The correct order of electron affinities is as follows $N \,< \,O \,<\, S \,<\, Cl$.

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