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AIIMS 201925 May
Exam
AIIMS
Year
2019
Date
25 May
Subject
Chemistry
Chapter
Chemical Bonding and Molecular Structure

AIIMS 2019 · 25 May · Chemistry · Chemical Bonding and Molecular Structure

Which of the following statements about CO_3^ 2- ion is correct?

Which of the following statements about CO32−\mathrm{CO}_3^{2-} ion is correct?Which of the following statements about CO_3^ 2- ion is correct?

Options

  1. AThe C−O\mathrm{C}-\mathrm{O} bond order is 1.5 .
  2. BThe formal charge on each oxygen atom is −0.67-0.67
  3. CIt has two C−O\mathrm{C}-\mathrm{O} single bonds and one C=O\mathrm{C}=\mathrm{O} double bond.
  4. DThe hybridization of central atom is sp3s p^3.

Correct answer

B. The formal charge on each oxygen atom is −0.67-0.67

Step-by-step solution

Which of the following statements about CO_3^ 2- ion is correct?
Bond order =4/3=1.33=4 / 3=1.33 Formal charge =−2/3=−0.67=-2 / 3=-0.67 All bonds are equivalent due to resonance and hybridisation of central atom is sp2s p^2.
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