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JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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Arrange the following elements in increasing
order of first ionization enthalpy:

Li, Be, B, C, N, O

Choose the correct answer from the options given
below:
View answer and explanation
Correct option: B
Li << B << Be << C << O << N
Option B (Li << B << Be << C << O << N) is correct because it accounts for the exceptions in the general trend of increasing ionization enthalpy across a period, specifically the lower ionization enthalpy of Boron compared to Beryllium and Oxygen compared to Nitrogen.

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