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JEE Main2005ChemistryClassification of Elements and Periodicity in PropertiesActual

In which of the following arrangements the order is NOT according to the property indicated against it?

Options

  1. AAl ³⁺ < Mg ²⁺ < Na ⁺ < F ⁻ Increasing ionic size
  2. BB < C < N < O Increasing first ionization enthalpy
  3. Cl < Br < F < Cl Increasing electron gain enthalpy (with negative sign)
  4. DLi < Na < K < Rb Increasing metallic radius

Correct answer

B. B < C < N < O Increasing first ionization enthalpy

Step-by-step solution

B < C < O < N

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