JEE Main Chemistry question

Statement 1: The first ionization energy of Be is greater than B. Statement 2: 2p-orbitals have lower energy than 2s-orbitals.

(A)Assertion is True, Reason is True; Reason is correct explanation for Assertion
(B)Assertion is True, Reason is True; Reason is not correct explanation for Assertion
(C)Assertion is True, Reason is FalseCorrect
(D)Assertion is False, Reason is True

Answer: (C)

Solution

Be () does have a higher first ionisation energy than B (), since removing an electron from Be means disturbing the stable, completely filled subshell, whereas B's lone electron is comparatively easy to remove — so the Assertion is true. The Reason,

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Question ID VK-133222