MLS Chemistry Exam questions with correct answers

Which of the following lamps provides a continuous spectrum of radiant energy in the visible, near IR and near UV regions of the spectrum? - Answer Tungsten filament Which of the following isolates light within a narrow region of the spectrum? - Answer Monochromator Which of the following is not descriptive of a photomultiplier tube? - Answer Cannot be used with a chopper Which of the following is false about a photomultiplier tube? - Answer Is composed of an iron plate and a layer of selenium Which type of photodetector employs a linear arrangement that allows it to respond to a specific wavelength resulting in complete UV visible spectrum analysis? - Answer Photodiode array When performing spectrophotometer quality assurance checks, what is the holmium oxide glass filter used to assess? - Answer Wavelength accuracy In spectrophotometric analysis, what is the purpose of the reagent blank? - Answer Correct for color contribution of the reagents In regard to bichromatic analysis, which of the following is false? - Answer Absorbance is measured at the spectral absorbance peak for a