Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AP EAMCET202021 Sep 2020Evening ShiftChemistryChemical Bonding and Molecular StructureActual

Which of the following statements is correct about ( CO ₃²⁻ ) ? A. The hybridisation of central atom is (s p^3 ). B. Its resonance structure has one ( C - O ) single bond and two ( C = O ) double bonds. C. The average formal charge on each carbon atom is 0.67 units. D. All ( C - O ) bond lengths are equal.

Options

  1. AA
  2. BA and C
  3. CB and D
  4. DC and D

Correct answer

D. C and D

Step-by-step solution

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.

Practice Chemical Bonding and Molecular Structure on Quantrex Academy →

More from Chemical Bonding and Molecular Structure

Which of the following sets are correctly matched? Molecule Hybrididization Geometry I. BrF ₅ sp ^3 d ^2 square pyramidal II. XeF ₆ sp ^3 d ^3 Distorted octahedral III. SF ₄ dsp ^2 2025The order of dipole moments of H ₂ O ( A ), CHCl ₃( ~B ) and NH ₃( C ) is 2025The correct order of increasing bond lengths of C - H , O - H , C - C and H - H is 2025The sum of the bond orders of O ₂²⁺, O ₂²⁻, O ₂⁺, O ₂⁻, O ₂ and sum of the unpaired electrons present in them respectively are 2025Match the following List-I (Molecule) List-II (Dipole moment in D) A) HCl I) 1.07 B) NH ₃ II) 1.85 C) H ₂ O III) 0.23 D) NF ₃ IV) 1.47 The correct answer is 2025Which of the following sets are correctly matched? Molecule Number of lone pairs of electrons on central atom Hybridization I) PCl ₃ 1 sp ^3 II) SO ₂ 1 sp ^2 III) SF ₄ 1 sp ^3 d IV 2025The number of molecules having lone pair of electrons on central atom in the following is ( BF ₃,~ SF ₄,~ SiCl ₄,~ XeF ₄,~ NCl ₃,~ XeF ₆,~ PCl ₅,~ HgCl ₂,~ SnCl ₂ ) 2025Observe the following molecules/ions. NH ₄⁺, NH ₃, BF ₃, OH ⁻, CH ₃⁺, H ⁺, CO , C ₂ H ₄ The number of Lewis bases in the above list is 2025 Full Chemical Bonding and Molecular Structure list All AP EAMCET PYQs