JEE Main Chemistry question

Assuming that Hund's rule is violated, the bond order and magnetic nature of the diatomic molecule is **[IIT JEE 2010]**

(A)1 and diamagneticCorrect
(B)0 and diamagnetic
(C)1 and paramagnetic
(D)0 and paramagnetic

Answer: (A)

Solution

has 6 valence electrons: normally (paramagnetic, bond order 1). If Hund's rule were violated, both electrons would instead pair into a single orbital,

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Question ID VK-156178