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AP EAMCET201920 Apr 2019Morning ShiftChemistryChemical Bonding and Molecular StructureActual

The molecule/ion having paramagnetic nature and a bond order of 1.0 is

Options

  1. A( He ₂⁺ )
  2. B( Li ₂⁺ )
  3. C( B ₂ )
  4. D( C ₂ )

Correct answer

C. ( B ₂ )

Step-by-step solution

( He ₂⁺= s^2 < ^* l s^1 ) ( BO = 2-1 2 =0.5 ) ( He ₂⁺ )ion having one unpaired electron. So, it is paramagnetic. ( aligned & Li ₂⁺= s^2 < ^ 1 s^2 < 2 s^1 & BO = 3-2 2 =0.5 (Paramagnetic) & ~B ₂= s^2 < ^* 1 s^2 < 2 s^2 < ^* 2 s^2 < 2 p_x^1= 2 p_y^1 & BO = 6-4 2 =1 (Paramagnetic) & C ₂ 1 s^2 < ^* 1 s^2 < 2 s^2 < ^* 2 s^2 < 2 p_x^2= 2 p_y^2 & BO = 8-4 2 =2 (Diamagnetic) aligned )

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