JEE Main 2019 — Classification of Elements and Periodicity in Properties Question with Solution
JEE Main 2019 (12 Apr Shift 2)
Question
In comparison to boron, berylium has:
Choose an option
Show full solutionCorrect option: B
Correct answer
Blesser nuclear charge and greater first ionisation enthalpy
Step-by-step explanation
Electronic configuration of Be
Electronic configuration of B
Due to full-filled configuration of Beryllium, it has higher first ionization energy.
Effective nuclear charge
of Be
of B
of B > of Be
Electronic configuration of B
Due to full-filled configuration of Beryllium, it has higher first ionization energy.
Effective nuclear charge
of Be
of B
of B > of Be
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This is a previous-year question from JEE Main 2019, covering the Classification of Elements and Periodicity in Properties chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.