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NEET 2013
Exam
NEET
Year
2013
Subject
Chemistry
Chapter
Classification of Elements and Periodicity in Properties

NEET 2013 · Chemistry · Classification of Elements and Periodicity in Properties

Which one of the following arrangements represents the correct...

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

Options

  1. AAl <Ca<O<< \mathrm{Ca} < \mathrm{O} < C << F
  2. BAl<O<C<Ca<F\mathrm{Al} < \mathrm{O} < \mathrm{C} < \mathrm{Ca} < \mathrm{F}
  3. CC << F << O << Al <Ca< \mathrm{Ca}
  4. DCa<Al<C<O<F\mathrm{Ca} < \mathrm{Al} < \mathrm{C} < \mathrm{O} < \mathrm{F}

Correct answer

D. Ca<Al<C<O<F\mathrm{Ca} < \mathrm{Al} < \mathrm{C} < \mathrm{O} < \mathrm{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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