AP EAMCET · Chemistry · Chemical Bonding and Molecular Structure
Which of the following statements is correct about \(\mathrm{CO}_3^{2-}\) ?
A. The hybridisation of central atom is \(s p^3\).
B. Its resonance structure has one \(\mathrm{C}-\mathrm{O}\) single bond and two \(\mathrm{C}=\mathrm{O}\) double bonds.
C. The average formal charge on each carbon atom is 0.67 units.
D. All \(\mathrm{C}-\mathrm{O}\) bond lengths are equal.
- A A
- B A and C
- C B and D
- D C and D
Answer & Solution
Correct Answer
(D) C and D
Step-by-step Solution
Detailed explanation
The hybridisation of central atom is \(s p^2\). Since a net charge of -2 is shared over 3 oxygen atoms, hence formal charge \(=0.67\) units. In resonating structures bonds are not fixed and therefore, all bond lengths are equal. Hence, options (c) and (d) are correct.
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