1. A Review of General Chemistry

Which of the following is a correct resonance structure for compound A, where compound A is ${\mathrm{CH}}_2=\mathrm{CH}-OH$?

Which of the following statements correctly describes the resonance structures of $S_{2}O$ (disulfur monoxide)?

Which of the following statements best describes the second most significant resonance structure of $\mathrm{benzene}$?

Which of the following does not represent a pair of resonance structures?

Which of the following statements best describes the two resonance structures of the carbocation intermediate formed during the reaction of $C_6{H}_5\mathrm{CH}{2}^{+}$ (the benzyl carbocation)?

For each of the following compounds, draw the important resonance forms. Indicate which structures are major and minor contributors or whether they have the same energy.

(d) [H₂CNO₂]^–

Which of the following anions has three possible resonance contributors?

a. Draw resonance contributors for the following species. Do not include structures that are so unstable that their contributions to the resonance hybrid would be negligible. Indicate which are major contributors and which are minor contributors to the resonance hybrid.

b. Do any of the species have resonance contributors that all contribute equally to the resonance hybrid?

10.

Draw the resonance contributors for the phenolate ion.

Draw all possible resonance structures for the reactive intermediates shown.

(c) 

Which of the following best explains what resonance structures are?

Which of the following anions has its negative charge resonance delocalized?

Which of the following statements about the resonance structures of $\mathrm{maleic} \mathrm{anhydride}$ is correct?

Draw resonance contributors for each of the following species and rank them in order of decreasing contribution to the resonance hybrid. Then draw the resonance hybrid.

e.

Which of the following statements about resonance structures is correct?