Home Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) Alkaline Earth Metals The first ionisation potential (eV) of Be an…
Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) Alkaline Earth Metals Single Correct MCQ
Published on: August 12, 2026

The first ionisation potential (eV) of Be and B respectively are :

A
8.29, 9.32
B
9.32, 9.32
C
8.29, 8.29
D
9.32, 8.29

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Verified by Experts
The correct answer is:
D

Be has higher ionisation energy than boron because of stable completely filled valence shell, 2s 2 as compared to less stable partially filled valence shell, 2s 2 2p 1

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