Answer Happy

OR 16. The Newman projection shown represents which point on the energy diagram below? 11. Which carbocation is thermodynamically most stable? (A) (B) Hy ee H (C) (D) H M 12. Which structure is NOT a resonance structure for this cation? OH (A) 1 (B) 2 (C)3 (D) 4 (A) OH (B) OH 17. The following represents a mechanism to produce 2-methoxybutane. The overall order of the reaction is based on the rate-determining step and will be rate= (C) OH (D) Br hout + -H OCH, + CH OH 13. Which structure represents the lowest energy conformer of trans-1-ethyl-2-methylcyclohexane? (A) CH, CHE (B) H.CHCS снен, -CHE (D) CH2CH CH,CH, CHE 14. Rank these compounds in order of decreasing boiling points: (A) 1>2> 3 (B) 1>3> 2 (C) 2>3> 1 (D) 3 > 2> 1 1) CH,CH,CH, OH 2) o сн,снён 3) CH CH CH.CH (A) [C.H.Br] [CH,OH] (B) { [CH,OH) (C)k[C.H.Br) (D) Can't predict 18. Which symbol denotes a set of resonance forms (contributing structures)? (A) - (B) = (C) (D) - 19. Styrene is an important vinyl monomer shown here. What is the degree of unsaturation for this compound? (A) 2 (B) 3 (04 20. The molecule shown is lactic acid, whic used the H production of the biodegradable HC polymer polylactic acid (PLA). Which is the most acidic hydrogen on lactic acid? (D) 5 Hy O-H 15 Rank these alkenes in order of decreasing stability (A) H. (B) H (C) H (D) H (1) 23 (A) 1<2<3<4 (B) 2<4<3<1 (C) 3 <2<1<4 (D) 4 <2<1<3 a) (4) 21. Which compound reacts most rapidly with cyanide ion in a polar, aprotic solvent? (A) 2-chloro-2-methylbutane (B) Z-bromo-2-methyl butane (C) 1-chloro-2-methylbutane (D) 1-chloro-3-methylbutane