Question detail
What does a peak at a higher chemical shift in a carbon-13 NMR spectrum typically indicate?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Nuclear magnetic resonance spectroscopy (A-level only)
Question
- A. The carbon is less shielded.
- B. The carbon is more shielded.
- C. The carbon is part of a double bond.
- D. The carbon is part of a ring structure.
Answer
The carbon is less shielded.
Explanation
The correct option is The carbon is less shielded.. The carbon is less shielded. is the best answer because it directly supports the AQA A-Level Chemistry objective to interpret integration and splitting patterns. This reasoning is anchored to NMR spectroscopy (A-level only) in Nuclear magnetic resonance spectroscopy (A-level only), and it separates splitting pattern from similar A-Level ideas rather than relying on a vague recall statement. Other options are weaker if they use the wrong evidence, calculation, mechanism, observation, unit, or conclusion for this subtopic.
Common mistake
Misunderstanding Integration Values
Students often misinterpret the integration values in NMR spectra, thinking they represent the number of protons directly rather than the relative number of protons in each environment.
To fix this, students should focus on understanding that integration values indicate the ratio of protons in different environments, not the exact number. Practice interpreting integration alongside splitting patterns to reinforce this concept.
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