all answer : ():2304 () (D) Amines 7. Which of the following compounds is a suit

Question

all answer

: ():2304 () (D) Amines 7. Which of the following compounds is a suitable base to prepare ester enolate of ethyl acetate? (A) Lithium diisopropylamide (B) Pyridine (C) Diisopropyl amine (D) Pyrrolidine 8. Which of following addition reactions of alkenes occur specifically in an anti- fashion: OsO, H20 (A) Dihydroxylation using (B) Addition of Bra (C) Hydroboration-oxidation (D) Hydrogenation using Ha-Pt 9. The conversion of 2-pentanone to butanoic acid is best accomplished with: (A) , NaOH (B) NaBHt (C) CrOs (D) Ag:0 10. A molecule has three degrees of unsaturation. In this molecule there would be (A) three rings (B) three double bonds (C) two rings and one double bond (D) one ring and two double bonds (E) any of the above 11. What is the IUPAC name of the following compound? H3 (A) (E)-3-methylpent-3-ene (B) (Z)-3-methylpent-3-ene (C) (E)-3-methylpent-2-ene (D) (Z)-3-methylpent-2-ene 12. Which of the following amines is most basic? (A) aniline (B) N-ethylaniline (C) N,N-diethylaniline (D) piperidine (E) pyrrole 13. In a solution of aspartic acid (pKa-7.4) adjusted to a pH of 2.74 (A) the ration of asparate to asparatic acid is 10 to 1 (B) the ration of asparate to asparatic acid is 100 to 1 (C) the ration of asparate to asparatic acid is 1000 to 1 (D) the ration of asparate to asparatic acid is1 to 10 (E) the ration of asparate to asparatic acid is 1 to 100

Explanation / Answer

7. answer: a

8. answer: b. because cyclic carbocation is the intermediate.

9. answer: C

10. answer: E

11. answer: C

12. answer: D

13. answer: E

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