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COMEDK2023Morning ShiftChemistryChemical Bonding and Molecular StructureActual

The ion that is isoelectronic with CO is

Options

  1. ACN ⁻
  2. BO ₂⁺
  3. CO ₂⁻
  4. DN ₂⁺

Correct answer

A. CN ⁻

Step-by-step solution

The molecule CO contains 6 + 8 = 14 electrons. Checking the number of electrons for each option: For CN ⁻ : The number of electrons is 6 + 7 + 1 = 14 . For O ₂⁺ : The number of electrons is 8 + 8 - 1 = 15 . For O ₂⁻ : The number of electrons is 8 + 8 + 1 = 17 . For N ₂⁺ : The number of electrons is 7 + 7 - 1 = 13 . Since CN ⁻ has 14 electrons, it is isoelectronic with CO . Answer: CN ⁻

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