Question detail
In infrared spectroscopy, which functional group is indicated by a broad absorption peak around 3200-3600 cm⁻¹?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Organic analysis
Question
- A. Aldehyde
- B. Alcohol
- C. Alkene
- D. Carboxylic acid
Answer
Alcohol
Explanation
The evidence shows that a broad absorption peak in the range of 3200-3600 cm⁻¹ is typical for O-H stretching vibrations, which are present in alcohols. This implies that the presence of this peak suggests the functional group is an alcohol. Thus, the correct answer is alcohol.
Common mistake
Misidentifying Functional Groups
Students often confuse the absorption peaks in infrared spectra, leading to incorrect identification of functional groups.
To fix this, students should carefully study the characteristic absorption ranges for different functional groups and practice interpreting spectra with reference materials.
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