Quiz 1 - Analytical Technique

A red-colored solution would show highest transmittance at:
A. 685nm
B. 525nm
C. 485nm
D. 420nm

Increase the intensity of electromagnetic radiation will just increase the number of photons. TRUE OR FALSE

Which of the following spectrum is more closely resembles an absorption spectrum ?
A. Mass spectrum
B. NMR spectrum
C. Fluorescence emission spectrum
D. Fluorescence excitation spectrum

Which of the following is the best method to check the stray light in the quality control process of a spectrometer?
A. a prism
B. a Sharp filter like didymium oxide glass
C. a Cut off filter
D. a grating monochromator

The _________ in a fluorometry is at a 90o angle from the ______

Wavelengths that occur in the blue-violet region have higher energy compared to wavelengths composing the orange-red region. TRUE OR FALSE

True or False: The primary purpose of a monochromator in fluorescence spectroscopy is to select both excitation and emission wavelengths

A microwave oven operates at a frequency of 2.45 GHz. Which property of water molecules allows them to be heated by this radiation?
A. Their nuclear magnetic resonance
B. Their dipole moment
C. Their ionization potential
D. Their covalent bonds

A flame atomic absorption spectrometer may be characterized by all of the following except:
A. Uses hollow cathode lamps
B. Requires fuel and oxidant gases
C. Needs temperature control
D. Measures emission only

Which detector is most appropriate for measuring very weak fluorescence signals?
A. photodiode
B. photocell
C. phototube
D. Photomultiplier tube