8 theme: . Fundamentals of spectrochemical methods in fuel analysis

Question 1

1. In spectrometry, what is analyzed to gather information about a sample?
   Electromagnetic radiation
   The magnetic polarity of the sample.
   The flow of electric current through the sample.

Answer 1

electromagnetic radiation

Question 2

What does spectrum in spectrochemistry express?

Answer 2

how the intensity of electromagnetic radiation depends on the energy of the radiation.

Question 3

How the energy of the radiation can be described?

Answer 3

By its requency
Wevelength
Wavenumber

Question 4

According to the type of interacting particles, Spectroscopic techniques can be divided into:

Answer 4

atomic spectroscopy,
molecular spectroscopy.

Question 5

5. This technique is used to determine which elements are contained in the sample..
   Atomic spectroscopy
   Molecular spectroscopy

Answer 5

atomic

Question 6

Molecular spectra has: band (continuous) character line (discontinuous) character line

Answer 6

band (continuous) character line

Question 7

Atomic spectra typically appears as sharp lines. True or false?

Answer 7

true

Question 8

An atom or molecule can absorb, release, absorb and later re-emit, scatter, reflect radiation after interacting with the sample. Is it true?

Answer 8

yes

Question 9

What is luminiscence as a spectroscopic technique?

Answer 9

When atom/molecule can absorb radiation and re-emit it after a while

Question 10

Photoluminiscence it is based on the detection of radiation caused by other radiation of a different energy (wavelength). Is it true?

Answer 10

yes

Question 11

Different spectroscopic methods are based on the interaction of a sample with specific ranges of electromagnetic radiation. Is it true?

Answer 11

yes

Question 12

Frequency represents the number of vibrations/movements performed in one second. Is it true?

Answer 12

yes

Question 13

The unit of frequency is hertz. Is it true?

Answer 13

yes

Question 14

Wavenumber represents the number of waves per unit length. the number of waves per 1 cm is most often given.

Answer 14

yes

Question 15

In AAS, the radiation absorbed by the free atoms of the sample in the gaseous state is evaluated. True or false?

Answer 15

true

Question 16

Transmission measurement is based on the evaluation of the weakened radiation flow after interaction with the sample. True or false?

Answer 16

true

Question 17

In measuring atomic spectra, the characteristic radiation emitted by free atoms of the sample in gaseous state is evaluated

Answer 17

true

Question 18

In measuring atomic spectra, what is used to convert the sample into the state of free atoms and excite them?

Flame
Spark discharge
Indused plasma
Ionisized gas

Answer 18

Flame
Spark discharge
Indused plasma

Question 19

During measuring atomic spectra, X-ray fluorescence radiation is produced by……

Answer 19

the ejection of an inner electron from an atom by the effect of the incident X-ray radiation.

Question 20

What is X-ray?

Answer 20

X-rays are a form of electromagnetic radiation, They are part of the electromagnetic spectrum and have high energy, which allows them to penetrate matter

Question 21

Microwave Spectroscopy is a molecular spectroscopy technique. True or false?

Answer 21

true

Question 22

IR (infrared) Spectroscopy is an atomic technique.

Answer 22

False, its molecular

Question 23

X ray is molecular technique

Answer 23

False, its atomic

Question 24

UV-Vis (Ultraviolet-Visible Spectroscopy) is a molecular technique.

Answer 24

true

Question 25

Molecular technique can provide info about molecular bondings and functional groups.

Answer 25

true