Question detail
Which of the following statements about proton NMR chemical shifts is correct?
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. Chemical shifts are influenced by electronegative atoms.
- B. Chemical shifts are measured in volts.
- C. Higher ppm values indicate more shielded protons.
- D. All protons resonate at the same chemical shift.
Answer
Chemical shifts are influenced by electronegative atoms.
Explanation
The correct option is Chemical shifts are influenced by electronegative atoms.. Chemical shifts are influenced by electronegative atoms. 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.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.