10. Predict the product (A) (B) (C) (D) No reaction 11. The E2 mechanism is (A) Concerted (B) Nonconcerted (C) Two step (D) Saytzeff 12. A polar, aprotic solvent favors which mechanism most? (A) SN2 (B) E2 (C) SN1 (D) E1 13. Why will this molecule not undergo an E2 elimination? (A) The molecule has a poor leaving group (B) The bulky side chains hinder base attack (C) The molecule has no -hydrogens (D) The molecule has non-antiperiplanar -hydrogens 14. What is the rate-limiting step of the E1 mechanism? (A) Quenching of the carbocation (B) Formation of the carbocation (C) elimination of the /beta -hydrogen (D) Deprotonation of the solvent 15. Which of the following is a polar, aprotic solvent? (A) (B) (C) Ethanol (D) Benzene 16. SN2 reactions generally proceed with (A) Retention of stereochemical configuration (B) Inversion of stereochemical configuration (C) Retention and inversion of stereochemical configuration (D) -elimination