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MCQ
What does a sharp, strong absorption around 1700 cm-1 in an IR spectrum indicate?
Chemistry
A O-H stretch
B C=O stretch (carbonyl)
C C-H stretch
D N-H stretch
Explanation

A strong absorption near 1700 cm-1 is characteristic of the C=O stretching vibration, indicating the presence of a carbonyl group (aldehyde, ketone, acid, ester, etc.).

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