CHE 029 P2 Review Quiz

Correct sequence for spectrophotometer mechanism

• Source - Detector - Sample - Wavelength selector - Signal Processor

• Source - Wavelength selector - Detector - Sample - Signal Processor

• Source - Wavelength selector - Sample - Detector - Signal Processor

• Source - Wavelength selector - Sample- Signal Processor - Detector

Which of the following functional groups has an absorption peak wave number of 2260 – 2100 cm-1?

• Aliphatic

• Alkene

• Alkyne

• Amide

What is the general term given to types of chromatography which are more effective in the separation of macromolecules?

• Partition

• affinity

• gel permeation

• column

The stationary phase is always composed of a solid phase.

The mobile phase is always composed of a liquid phase.

• Only the 1st statement is correct.

• Both statements are correct.

• Only the 2nd statement is correct.

• Both statements are incorrect.

Which is NOT a principle of chromatography

• determination of strength of solutions

• indication of molecular structure

• determination of homogeneity

• segregation from complex mixtures

What type of quantum change would the Microwave possess?

• Change of spin

• Change of configuration

• Change of orientation

• Change of nuclear configuration

In the analysis of the absorption spectra for colored samples, if the complementary color transmitted of a sample is Blue, the color of the light absorbed is:

• Green-blue

• Red

• Blue-green

• Yellow

If the wavelength region is at 595-650nm, the color of light absorbed is

• Orange

• Yellow

• Red

• Yellow-green

In a spectrophotometric cell of 1.0 cm path length, the solution of a substance shows the absorbance value of 1.60. If the molar absorptivity of the compound is 2.2 x 10^4 L mol cm, calculate the concentration of the sub-stance in solution. What is the concentration of the substance in that solution?

• 7.28x10^-5 mol L-1

• 2.84x10^-5 mol L-1

• 2.78x10^-5 mol L-1

• 7.82x10^-5 mol L-1

Which of the following sources utilizes wavelengths: 160 – 380nm

• H2 and D2 lamps

• Xenon arc lamp

• Nernst glower

• Nichrome wire