FLAME EMISSION PHOTOMETERS

Question 1

The function of pressure regulators in the emission system of flame photometer is to have a steady flame which is free from flickers.
a) True
b) False

Answer 1

a) True

Question 2

In Total consumption burner, only samples of particular droplet size will enter the burner.
a) True
b) False

Answer 2

b) False

Question 3

Which of the following is the principle of Flame emission photometers?
a) Radiation is absorbed by non-excited atoms in vapour state and are excited to higher states
b) Medium absorbs radiation and transmitted radiation is measured
c) Colour and wavelength of the flame is measured
d) Only wavelength of the flame is measured

Answer 3

c) Colour and wavelength of the flame is measured

Question 4

In Flame emission photometers, the measurement of _____________ is used for qualitative analysis.
a) Colour
b) Intensity
c) Velocity
d) Frequency

Answer 4

a) Colour

Question 5

In Flame emission photometers, the measurement of _____________ is used for quantitative analysis.
a) Colour
b) Intensity
c) Velocity
d) Frequency

Answer 5

b) Intensity

Question 6

Which of the following is not an advantage of Laminar flow burner used in Flame photometry?
a) Noiseless
b) Stable flame for analysis
c) Efficient atomization of sample
d) Sample containing two or more solvents can be burned efficiently

Answer 6

d) Sample containing two or more solvents can be burned efficiently

Question 7

Laminar flow burner used in Flame photometers is also known as ____________
a) Turbulent burner
b) Premix burner
c) Total consumption burner
d) Nozzle mix burner

Answer 7

b) Premix burner

Question 8

Which of the following is the advantage of prism monochromators?
a) Dispersion is non-overlapping
b) Dispersion occurs in non-linear manner
c) Dispersion is overlapping
d) Dispersion occurs in a linear manner

Answer 8

a) Dispersion is non-overlapping

Question 9

Which of the following is the advantage of grating monochromators?
a) Dispersion is non-overlapping
b) Dispersion occurs in non-linear manner
c) Dispersion is overlapping
d) Dispersion occurs in a linear manner

Answer 9

d) Dispersion occurs in a linear manner

Question 10

Which of the following is not a detector used in Flame emission photometers?
a) Photronic cell
b) Photovoltaic cell
c) Photoemissive tube
d) Chromatogram

Answer 10

d) Chromatogram

Question 11

Phototubes are more sensitive than photovoltaic cells.
a) True
b) False

Answer 11

a) True

Question 12

Which of the following is not an application of Flame emission photometers?
a) Analysis of biological fluids
b) Determination of sodium, potassium in soil
c) Determination of metals such as Mn, Cu
d) Analysis of complex mixtures

Answer 12

d) Analysis of complex mixtures

Question 13

Which of the following is not an advantage of a photovoltaic cell which is used as a detector in Flame emission photometers?
a) Portable
b) No external supply
c) Robust in construction
d) Does not show fatigue

Answer 13

d) Does not show fatigue