The Given Molecule Shows Two Absorption Peaks, Each at 1760

question 24

Multiple Choice

The given molecule shows two absorption peaks, each at 1760 cm⁻¹ and 1810 cm⁻¹. The peaks are due to the _____. ​

• A) symmetric and unsymmetric bending vibrations of the entire anhydride group
• B) symmetric stretching vibration of only one carbonyl group
• C) unsymmetric stretching vibrations of the carbonyl groups
• D) symmetric and unsymmetric stretching vibrations of the entire anhydride group

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Definitions:

Auscultatory Gap

A temporary disappearance of sounds heard over the brachial artery when measuring blood pressure; occurs between the systolic and diastolic pressures.

Systolic Pressure

The maximum arterial pressure during contraction of the heart's left ventricle, commonly the top number in a blood pressure reading.

Diastolic Pressure

The lower measurement of blood pressure, indicating the pressure in the arteries when the heart rests between beats.

Expiration

The expulsion of air from the lungs in breathing.