Question detail
In proton NMR, what does a splitting pattern of a signal 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 number of adjacent protons
- B. The number of different environments
- C. The type of functional group
- D. The molecular weight
Answer
The number of adjacent protons
Explanation
The correct option is The number of adjacent protons. The number of adjacent protons is the best answer because it directly supports the AQA A-Level Chemistry objective to use proton NMR chemical shifts to identify proton environments. This reasoning is anchored to NMR spectroscopy (A-level only) in Nuclear magnetic resonance spectroscopy (A-level only), and it separates proton NMR 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
Incorrect Identification of Chemical Shifts
Students often misidentify the proton environments based on the chemical shifts in the NMR spectrum, confusing the values for different types of protons.
To fix this, students should refer to a reliable table of chemical shift values for protons in various environments, ensuring they match the observed shifts with the correct proton types.
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