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JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

1 Medium

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Analyzing +4 | -1

In which of the following options order of arrangement does not agree with the variation of property indicated against it?

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Correct option: B

\mathrm{B < C < N < O }

(increasing first ionisation enthalpy)

Option B is correct because the first ionization enthalpy generally increases across a period, but there are exceptions due to electron configurations.

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