Which of the following statements about $\mathrm{CO}_3^{2-}$ ion is correct?

Which of the following statements about $\mathrm{CO}_3^{2-}$ ion is correct?
  1. The $\mathrm{C}-\mathrm{O}$ bond order is 1.5 .
  2. The formal charge on each oxygen atom is $-0.67$
  3. It has two $\mathrm{C}-\mathrm{O}$ single bonds and one $\mathrm{C}=\mathrm{O}$ double bond.
  4. The hybridization of central atom is $s p^3$.

Solution


Bond order $=4 / 3=1.33$ Formal charge $=-2 / 3=-0.67$ All bonds are equivalent due to resonance and hybridisation of central atom is $s p^2$.

Asked in: NEET 2023 (Manipur)

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