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NTA Abhyas NEET2020ChemistryChemical Bonding and Molecular StructurePractice

Among the given species the one which contains weakest carbon- oxygen bond : CO 2 ,   CH 3 COO − ,   CO,   CO 3 2 −

Options

  1. AC O 2
  2. BC H 3 C O O -
  3. CC O
  4. DC O 3 2 -

Correct answer

D. C O 3 2 -

Step-by-step solution

Bond   strength   ∝   Bond   order Bond order is determined through resonating structure. Among the given species, the bond dissociation energy of C - O bond is minimum in case of C O 3 2 - by which C - O bond become more weaker in C O 3 2 - or the bond order of C O 3 2 - (1.33) is minimum so the bond become weaker.

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