S23_TQ2_Modified.pdf

SPRING 2023 CHE 327 THEORY QUIZ #2 MODIFIED This quiz is based on material related to the “Isomerization of dimethyl maleate”, “Extraction of β- carotene,” “Synthesis of a fragrant ester,” & “Multistep synthesis of lidocaine,” experiments including spectrosc...

SPRING 2023 CHE 327 THEORY QUIZ #2 MODIFIED This quiz is based on material related to the “Isomerization of dimethyl maleate”, “Extraction of β- carotene,” “Synthesis of a fragrant ester,” & “Multistep synthesis of lidocaine,” experiments including spectroscopy [GC, IR and NMR]. USE THE ANSWER SHEET SCANTRON FOR YOUR ANSWERS. You will need your university ID, pencil, eraser, pen and a calculator to take the exam. You will not be allowed to borrow a calculator during the exam. No form of communication/collaboration is allowed with other students during the exam. Name University ID Signature SPRING 2023 CHE 327 THEORY QUIZ #2 APR 17TH, 2023 Questions 1-10 are multiple choice. 1. (2 pts) Shown below is the developed TLC plate of three fractions from a column chromatography experiment. Of the three samples, which represents the earliest fraction from the column? A B C a. Sample observed in lane A. b. Sample observed in lane B. c. Sample observed in lane C. d. Cannot predict based only on the TLC plate. 2. (2 pts) Which of the following do you need to synthesize the ester shown below: O O butyl isobutyrate OH OH OH OH O O I II III IV a. I & II. b. III & IV. c. I & IV. d. II & IV. e. II & III 2 SPRING 2023 CHE 327 THEORY QUIZ #2 APR 17TH, 2023 3. (2 pts) Select the sequence that correctly identifies the TLC plates in order of increasing polarity in which the plates were developed (i.e., run). a. 2