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NEET2022ChemistryClassification of Elements and Periodicity in PropertiesActual

The correct order of first ionization enthalpy for the given four element is :

Options

  1. AC < N < F < O
  2. BC < N < O < F
  3. CC < O < N < F
  4. DC < F < N < O

Correct answer

C. C < O < N < F

Step-by-step solution

array |c|c|c|c|c| Explanation: & C & N & O & F (Half-filled) & 2 s^2 2 p^2 & 2 s^2 2 p^3 & 2 s^2 2 p^4 & 2 s^2 2 p^5 array Across the period Z_ eff increases but nitrogen has half-filled orbital which makes it more stable. Order of IE ₁= C < O < N < F

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