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

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry3. Classification of elements and periodicity in properties1 Mark
MCQ
The process requiring absorption of energy is
  • ✓
    $N \to N^-$
  • B
    $F \to F^-$
  • C
    $Cl \to Cl^-$
  • D
    $H \to H^-$
✓

Answer

Correct option: A.
$N \to N^-$
a
$(a)$ Nitrogen has stable $2p^3$ configuranon and also due to high $e^-$ charge density at outermost orbital it requires energy to add one extra $e^-$ in its outer most  shell i.e., its first electron gain enthalpy is positive

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