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NEET UG CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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The correct decreasing order of first ionisation enthalpies of five elements of the second period is

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Correct option: C

F\mathrm{ } > \mathrm{ }N\mathrm{ } > \mathrm{ }C\mathrm{ } > \mathrm{ }Be\mathrm{ } > \mathrm{ }B

Option C (

F\mathrm{ } > \mathrm{ }N\mathrm{ } > \mathrm{ }C\mathrm{ } > \mathrm{ }Be\mathrm{ } > \mathrm{ }B

) is correct because it considers the general trend of increasing ionization energy across a period and the exceptions due to stable electronic configurations (half-filled and filled orbitals).

NEET UG CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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