CHM 2211 Quiz 1 Fall 2024 PDF
Document Details
Uploaded by Deleted User
Broward College South Campus
2024
Broward College
Dr. Rajendra Shakya
Tags
Summary
This is a past paper from Broward College, covering topics in organic chemistry. The quiz covers various aspects of IR spectroscopy, molecular structure, and bonding including carbonyl stretches. This quiz is considered part of the chapter 12 material for CHM 2211 course.
Full Transcript
## Quiz - 1 (Chapter-12) ### Name: ### Key set-1 ### Instructor: Dr. Rajendra Shakya ### Broward College - South Campus ### CHM 2211 Section-1 Fall-2024 1. In addition to a carbonyl stretch, which of the following molecules exhibits two characteristic stretches at 2700 and 2800 cm<sup>-1</sup...
## Quiz - 1 (Chapter-12) ### Name: ### Key set-1 ### Instructor: Dr. Rajendra Shakya ### Broward College - South Campus ### CHM 2211 Section-1 Fall-2024 1. In addition to a carbonyl stretch, which of the following molecules exhibits two characteristic stretches at 2700 and 2800 cm<sup>-1</sup>? * a) (CH<sub>3</sub>CH<sub>2</sub>)<sub>2</sub>CO * b) CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>CHO * c) CH<sub>3</sub>CH<sub>2</sub>CO<sub>2</sub>CH<sub>3</sub> * d) CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>CO<sub>2</sub>H * e) CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>COCI 2. When a high energy electron impacts molecule *M* in the ionization chamber, what type of species is initially produced? * A) cation * B) anion * C) radical * D) radical cation * E) radical anion 3. Which of the following compounds gives a carbonyl bond absorption at the lowest frequency? * 1 * 2 * 3 * 4 4. Which of the following compounds would contain characteristic IR stretches at 3300 and 2200 cm<sup>-1</sup>? * A) CH<sub>3</sub>CH<sub>2</sub>CHO * B) CH<sub>3</sub>CH=CHCH<sub>2</sub>OH * C) (CH<sub>3</sub>)<sub>2</sub>CHCN * D)CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>C=CH * E) CH<sub>3</sub>C=CCH<sub>2</sub>CH<sub>3</sub> 5. Which of the following does not have a broad absorption with one or more spikes that is centered about 3300 cm<sup>-1</sup> in the IR? * A) CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>)<sub>3</sub>N * B) (CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>)<sub>2</sub>NH * C) CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>NH<sub>2</sub> * D) (CH<sub>3</sub>)<sub>3</sub>CNH<sub>2</sub> * E) (CH<sub>2</sub>=CHCH<sub>2</sub>)<sub>2</sub>NH 6. Which compound would be expected to show intense IR absorption at 1680 cm<sup>-1</sup>? * A) OH * OCH<sub>3</sub> * B) * OH * C) * O 7. Which of the following structures is consistent with the IR spectra shown below? * a) OH * b) OH * c) OH * d) OH * e) * **% Transmittance** * 80 * 60 * 40 * 20 * 3500 3000 2500 2000 1500 1000 500 8. Which of the following molecules would have the lowest frequency carbonyl stretch? * A) (CH<sub>3</sub>CH<sub>2</sub>)<sub>2</sub>CO * B) CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>CHO * C) CH<sub>3</sub>CH<sub>2</sub>CO<sub>2</sub>CH<sub>3</sub> * D) CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>CO<sub>2</sub>H * E) CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>CONH<sub>2</sub> 9. Which of the following compounds has the lowest carbonyl stretching frequency? * 10. Which of the following compounds gives an infrared spectrum with peaks in the ranges of 3200-3650 (strong, broad) and 1600-1640 cm<sup>-1</sup> (medium); But does not have peaks at 1630-1820 (strong)? * 1 * 2 * 3 OH * 4 OH
