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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the percentage of the 13C isotope in natural carbon?
💡 Hint: Recall the common isotopic distribution in carbon.
Question 2
Easy
What does a single signal in 13C NMR indicate?
💡 Hint: Think about symmetry in molecular structures.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the main purpose of 13C NMR spectroscopy?
- To determine molecular weight
- To analyze carbon frameworks
- To identify infrared spectra
💡 Hint: Think about what specific information NMR provides.
Question 2
True or False: The area under the peaks in a 13C NMR relates directly to the number of carbon atoms.
- True
- False
💡 Hint: Consider how integration functions differently in NMR types.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You have a 13C NMR spectrum with signals at 0, 20, 130, and 200 ppm. Propose a possible structure for a molecule with these chemical shifts.
💡 Hint: Refer to the characteristic ranges for functional groups to guide you.
Question 2
Calculate and interpret the degree of unsaturation for a molecule with a molecular formula of C8H8 based on the presence of signals in the 13C NMR.
💡 Hint: Count the number of hydrogens and relate it to unsaturation.
Challenge and get performance evaluation