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Instrumentation and Working Principles of Solutions Infra Red (IR) Spectroscopy

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1. What spectrum of light does IR spectroscopy correspond to?

a: 0.01-10 nm wavelength Explanation

Explanation

b: 10-400nm wavelength Explanation

Explanation

c: 400-700nm wavelength Explanation

Explanation

d: 700nm-1mm wavelength Explanation

Explanation

2. What type of molecular phenomenon does IR spectroscopy correspond to?

a: Molecular Rotation Explanation

Explanation

b: Molecular Vibration Explanation

Explanation

c: Electronic Excitation Explanation

Explanation

d: Molecular Translation Explanation

Explanation

3. Which of the following chemical changes will IR spectroscopy be able to capture?

a: Rotation of a CO₂ molecule. Explanation

Explanation

b: Cleavage of C-O bond in CO₂. Explanation

Explanation

c: Striking of CO₂ gas to the walls of the container. Explanation

Explanation

d: Excitation of CO₂ to a higher electronic state. Explanation

Explanation

4. Which of the following statements is true concerning infrared (IR) spectroscopy?

a: IR spectroscopy is used to determine the frequency of vibrations between atoms Explanation

Explanation

b: The fingerprint region is most easily used to determine the functional groups in the molecule Explanation

Explanation

c: IR spectroscopy is used to determine the shape of the carbon backbone Explanation

Explanation

d: IR spectroscopy can be used to easily determine molecular mass Explanation

Explanation

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