Photometry(General Knowledge > General Science ) Questions and answers for exam Preparation

Question 1. In Flame photometry, Flame color’s intensity tells about

how much of the element present
Number of compound present
complex structure of compound
none of above

Explanation:-

Answer: Option A. -> how much of the element present

Question 2. Laminar flow burner used in Flame photometers is also known as

Turbulent burner
Premix burner
Total consumption burner
Nozzle mix burner

Explanation:-

Answer: Option B. -> Premix burner

Question 3. Which of the following is the advantage of prism monochromators?

Dispersion is non-overlapping
Dispersion occurs in non-linear manner
Dispersion is overlapping
Dispersion occurs in a linear manner

Explanation:-

Answer: Option A. -> Dispersion is non-overlapping

Question 4. Which of the following is the advantage of grating monochromators?

Dispersion is non-overlapping
Dispersion occurs in non-linear manner
Dispersion is overlapping
Dispersion occurs in a linear manner

Explanation:-

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?

Noiseless
Stable flame for analysis
Efficient atomization of sample
Sample containing two or more solvents can be burned efficiently

Explanation:-

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

Colour
Intensity
Velocity
Frequency

Explanation:-

Answer: Option B. -> Intensity

Question 7. Which of the following is the principle of Flame emission photometers?

Radiation is absorbed by non-excited atoms in vapour state and are excited to higher states
Medium absorbs radiation and transmitted radiation is measured
Colour and wavelength of the flame is measured
Only wavelength of the flame is measured

Explanation:-

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

They need higher amount of energy for excitation than 1st and 2nd group.
They need lesser amount of energy for excitation than 1st and 2nd group.
not related to energy
depends on molecular weight

Explanation:-

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

True
False

Explanation:-

Answer: Option A. -> True

Question 10. Flame photometry is mainly used for,

1st and 2nd group elements
3rd and 4th group elements
Whole periodic table
none of this

Explanation:-

Answer: Option A. -> 1st and 2nd group elements