Resonance — practice questions

Question 1 · difficulty L2 · understanding

The difference in energy between the actual structure and the lowest energy resonance structure for the given compound is

• A. electromeric energy
• B. resonance energy
• C. ionization energy
• D. hyperconjugation energy

Question 2 · difficulty L3 · understanding

Identify the species having one $$\pi$$-bond and maximum number of canonical forms from the following :

• A. SO 3
• B. O 2
• C. SO 2
• D. CO$$_3^{2 - }$$

Question 3 · difficulty L3 · understanding

Identify the correct answer.

• A. Three resonance structures can be drawn for ozone
• B. $$\mathrm{BF}_3$$ has non-zero dipole moment
• C. Dipole moment of $$\mathrm{NF}_3$$ is greater than that of $$\mathrm{NH}_3$$
• D. Three canonical forms can be drawn for $$\mathrm{CO}_3^{2-}$$ ion