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JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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Analyzing +4 | -1

Assertion :The

1^{\text {st}}

IP of

\mathrm{Be}

is greater than that of

\mathrm{B}

.

Reason : 2p orbital is lower in energy than 2s.

View answer and explanation

Correct option: C

If Assertion is True but the Reason is False

Option C is correct. The first ionization potential (IP) of Be is greater than that of B because Be has a stable, fully filled 2s orbital, while B has a partially filled 2p orbital. The reason is false because 2s orbital is lower in energy than 2p.

JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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