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

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The increasing order of first ionisation enthalpies of the elements B, P, S and F (lowest first) is

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Correct option: D

B < S < P < F

Option D (

B < S < P < F

) is correct because ionization energy generally increases across a period, with exceptions due to half-filled orbitals (P).

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