(Solved): 9. Which of the following molecules cannot exhibit cis/trans isomerism? a) b) c) d) c) none of thes ...

9. Which of the following molecules cannot exhibit cis/trans isomerism? a) b) c) d) c) none of these (i.e. all of them can exhibit cis/trans isomerism) 10. Which of these molecules readily forms a resonance-stabilized carbocation? a) b) c) d) e) all of these 11. Which of the following is not an acceptable resonance contributor for this carbocation? a) b) c) d) 12. The carbocation that forms from the molecule in the box would be: a) racemic c) optically active c) a meso compound b) achiral d) unreactive 13. What is the hybridization state of the atom that bears the positive charge within this species? a) \( s p \) c) \( s p^{2} \) e) It cannot be determined b) \( \mathrm{sp}^{3} \) d) \( \mathbf{p} \) 14. Which of the following alkyl halides would not undergo an \( \mathrm{S}_{\mathrm{N}} 2 \) substitution reaction with methoxide ion? a) 5-iodo-2-methyloctane c) 1-bromopentane e) 3-bromo-3-methyloctane b) chloromethane d) iodocthane