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PHOTOMETRY MCQs

Total Questions : 19 | Page 1 of 2 pages
Question 1. In Flame photometry, Flame color’s intensity tells about
  1.    how much of the element present
  2.    Number of compound present
  3.    complex structure of compound
  4.    none of above
 Discuss Question
Answer: Option A. -> how much of the element present
Question 2. Laminar flow burner used in Flame photometers is also known as
  1.    Turbulent burner
  2.    Premix burner
  3.    Total consumption burner
  4.    Nozzle mix burner
 Discuss Question
Answer: Option B. -> Premix burner
Question 3. Which of the following is the advantage of prism monochromators?
  1.    Dispersion is non-overlapping
  2.    Dispersion occurs in non-linear manner
  3.    Dispersion is overlapping
  4.    Dispersion occurs in a linear manner
 Discuss Question
Answer: Option A. -> Dispersion is non-overlapping
Question 4. Which of the following is the advantage of grating monochromators?
  1.    Dispersion is non-overlapping
  2.    Dispersion occurs in non-linear manner
  3.    Dispersion is overlapping
  4.    Dispersion occurs in a linear manner
 Discuss Question
Answer: Option D. -> Dispersion occurs in a linear manner
Question 5. Which of the following is disadvantage of Laminar flow burner used in Flame photometry?
  1.    Noiseless
  2.    Stable flame for analysis
  3.    Efficient atomization of sample
  4.    Sample containing two or more solvents can be burned efficiently
 Discuss Question
Answer: Option D. -> Sample containing two or more solvents can be burned efficiently
Question 6. In Flame emission photometers, the measurement of _____________ is used for qualitative analysis
  1.    Colour
  2.    Intensity
  3.    Velocity
  4.    Frequency
 Discuss Question
Answer: Option B. -> Intensity
Question 7. Which of the following is the principle of Flame emission photometers?
  1.    Radiation is absorbed by non-excited atoms in vapour state and are excited to higher states
  2.    Medium absorbs radiation and transmitted radiation is measured
  3.    Colour and wavelength of the flame is measured
  4.    Only wavelength of the flame is measured
 Discuss Question
Answer: Option C. -> Colour and wavelength of the flame is measured
Question 8. The elements like gold, silver, & inert gases are not analyzed by flame photometry because
  1.    They need higher amount of energy for excitation than 1st and 2nd group.
  2.    They need lesser amount of energy for excitation than 1st and 2nd group.
  3.    not related to energy
  4.    depends on molecular weight
 Discuss Question
Answer: Option A. -> They need higher amount of energy for excitation than 1st and 2nd group.
Question 9. Phototubes are more sensitive than photovoltaic cells
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 10. Flame photometry is mainly used for,
  1.    1st and 2nd group elements
  2.    3rd and 4th group elements
  3.    Whole periodic table
  4.    none of this
 Discuss Question
Answer: Option A. -> 1st and 2nd group elements

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