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- Question
Why are rotational transitions of little use to a spectroscopist?
Options- A. Because the energy required to induce a rotational transition is so small that it cannot be measured
- B. Because rotational transitions are extremely rare
- C. Because, in liquids and solids, spectral lines corresponding to rotational transitions are broadened as the result of molecular collisions and other interactions
- D. All of the above
- Correct Answer
- Because, in liquids and solids, spectral lines corresponding to rotational transitions are broadened as the result of molecular collisions and other interactions
- 1. In the equation, A = ? bc, what quantity is represented by "?"?
Options- A. Absorbtivity
- B. Molar absorbtivity
- C. Path length
- D. None of these Discuss
- 2. Main function of insulin hormone is to
Options- A. increase glycogen in liver
- B. decrease glycogen in liver
- C. increase blood sugar
- D. decrease blood sugar Discuss
- 3. Vitamin-C is considered as a
Options- A. water soluble
- B. fat soluble
- C. fat and water soluble
- D. none of these Discuss
- 4. What metal ion is specifically bound by vitamin B12?
Options- A. Cobalt
- B. Copper
- C. Zinc
- D. Iron Discuss
- 5. The reductant, NADH, transfers the electrons via a flavo-proteins to the specific disulfide (S-S) protein to form a dithiol (SH,SH) protein which converts vitamin
Options- A. B12(Co2+)to B12(Co)
- B. B12(Co) to B12(Co2+)
- C. B12(Co2+)to B12(Co+)
- D. B12(Co+)to B12(Co2+) Discuss
- 6. Why is it generally preferable to use absorbance as a measure of absorption rather than % transmittance?
Options- A. Because %T cannot be measured as accurately as absorbance
- B. Because %T is dependant on the power of the incident radiation
- C. Because absorbance is proportional to the concentration of the analyte, whereas %T is not
- D. none of the above Discuss
- 7. A simple harmonic oscillator may absorb energy
Options- A. at anytime.
- B. when the frequencies match exactly
- C. when the amplitudes are the same.
- D. at no time. Discuss
- 8. Beer's Law states that
Options- A. absorbance is proportional to both the path length and concentration of the absorbing species
- B. absorbance is proportional to the log of the concentration of the absorbing species
- C. absorbance is equal to P0 / P
- D. none of the above Discuss
- 9. Vibrational spectroscopy is
Options- A. a large mass on a weak spring
- B. a flashlight through a prism and shake it
- C. a class of spectroscopic techniques which analyzes molecular motions
- D. an Infrared spectroscopy Discuss
- 10. Molar absorbtivity is the measure of the
Options- A. amount of light absorbed per unit length
- B. amount of light absorbed per unit concentration
- C. amount of light reflected and absorbed per unit concentration
- D. None of the above Discuss
Spectroscopy problems
Search Results
Correct Answer: Molar absorbtivity
Correct Answer: decrease blood sugar
Correct Answer: water soluble
Correct Answer: Cobalt
Correct Answer: B12(Co2+)to B12(Co+)
Correct Answer: Because absorbance is proportional to the concentration of the analyte, whereas %T is not
Correct Answer: when the frequencies match exactly
Correct Answer: absorbance is proportional to both the path length and concentration of the absorbing species
Correct Answer: a class of spectroscopic techniques which analyzes molecular motions
Correct Answer: amount of light absorbed per unit concentration
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