Mass spectrometry in organic analysis Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. In a mass spectrum the peak with the highest m/z is at 60. What is this peak?
- A. The molecular ion
- B. A fragment ion only
- C. The base peak always
- D. The carbon-13 peak
2. Why can high-resolution mass spectrometry distinguish CO from N₂?
- A. Their whole-number masses differ
- B. Their precise masses differ because atomic masses are not whole numbers
- C. CO has a charge but N₂ does not
- D. N₂ does not form a molecular ion
3. What is the precise Mᵣ of CH₄O (C = 12.0000, H = 1.0078, O = 15.9949)?
- A. 32.0000
- B. 31.0183
- C. 32.0261
- D. 32.0360
4. A compound has a precise Mᵣ of 60.0210. Which formula fits: C₃H₈O (60.0573) or C₂H₄O₂ (60.0210)?
- A. C₃H₈O
- B. Neither
- C. Both
- D. C₂H₄O₂
5. Which statement is correct about a precise relative molecular mass?
- A. It shows the structure of the molecule
- B. It shows the functional groups present
- C. It shows the number of isomers
- D. It shows the molecular formula but not the structure