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NEET2013ChemistryClassification of Elements and Periodicity in PropertiesActual

Which one of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for C , Ca , Al , F and O ?

Options

  1. AAl < Ca < O < C < F
  2. BAl < O < C < Ca < F
  3. CC < F < O < Al < Ca
  4. DCa < Al < C < O < F

Correct answer

D. Ca < Al < C < O < F

Step-by-step solution

Down the group the electron gain enthalpy becomes less negative, while it becomes more negative along the period.

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