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JEE Advanced 2010Paper 2
Exam
JEE Advanced
Year
2010
Paper
Paper 2
Subject
Chemistry
Chapter
Structure of Atom

JEE Advanced 2010 · Paper 2 · Chemistry · Structure of Atom

Assuming that Hund's rule is violated, the bond order and magnetic...

Assuming that Hund's rule is violated, the bond order and magnetic nature of the diatomic molecule B2\mathrm{B}_2 is

Options

  1. A1 and diamagnetic
  2. B0 and diamagnetic
  3. C1 and paramagnetic
  4. D0 and paramagnetic

Correct answer

A. 1 and diamagnetic

Step-by-step solution

B2\mathrm{B}_2 : Total electrons =10=10 Configuration : σ1s2σ∗1s2σ2s2σ∗2s2π2px1=π2py1\sigma 1 s^2 \sigma^* 1 s^2 \sigma 2 s^2 \sigma^* 2 s^2 \pi 2 p_x^1=\pi 2 p_y^1 If Hunds rule is violated, then σ\sigma1 s² \sigma^* 1 s² σ\sigma2 s² \sigma^* 2 s² \quad π\pi2 p_x^2=π\pi2 p_y^0 So, diamagnetic  Bond order =6−42=\text{ Bond order }=\frac{6-4}{2}=1 Chemical bonding Conceptual II
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