WorksheetsSpectroscopy
Total questions: 20
Worksheet time: 17mins
Electromagnetic radiation is also referred as (a) .
This is the any of the ways in which light waves travel.
Amplitude
Direction of propagation
Frequency
Wavelength
Electromagnetic radiation consists of fluctuating _______ and _______ fields that spread through space along a linear path and with a constant velocity
electric, magnetic
kinetic, electric
magnetic, kinetic
electric, polarized
The speed of light is considered to be equal to _________.
3.00 × 108 m/s
2.00 × 108 m/s
2.99792 × 108 m/s
3.01 × 108 m/s
It is defined as the distance between successive peaks.
Wavelength
Amplitude
Frequency
Velocity
Which of the following is TRUE?
When light moves from one medium to another, its velocity changes and its frequency remains constant
When light moves from one medium to another, its velocity remains constant and its frequency changes.
When light moves from one medium to another, its velocity and its frequency undergo change.
When light moves from one medium to another, its velocity and its frequency do not change.
It is defined as the number of waves that pass a certain point in a specified amount of time.
Frequency
Amplitude
Wave Number
Wavelength
It is the reciprocal of wavelength and the spatial frequency of a wave.
Frequency
Amplitude
Wave Number
Wavelength
What do you call the beam of energetic particles?
(a)
The region that includes the electromagnetic waves we can see.
Radiofrequency waves
Microwaves
Infrared radiation
Visible region
Which of the following orders shows the correct sequence of increasing electromagnetic radiation wavelength.
gamma rays, radio waves, uv light
radio waves, uv light, gamma rays
radio waves, gamma rays, uv light,
gamma rays, uv light, radio waves
The energies associated with molecular vibrations fall in the of electromagnetic spectrum
Infrared radiation
Ultra-violet radiation
Visible light
X-rays
The measurement when there is a decrease in photon.
Absorbance
Emission
Refraction
Radiation
The release of energy when a molecule in an excited state returns to a lower energy state.
Absorbance
Emission
Refraction
Relaxation
What type of excitation is associated with UV-Visible spectroscopy?
electronic
rotational
nuclear
vibrational
What type of excitation is associated with IR spectroscopy?
electronic
rotational
nuclear
vibrational
What is IR or vibrational spectroscopy?
A method to identify and characterize compounds based on the vibrations of bonds.
A method to mix compounds based on vibration of the mixture.
A method to break bonds by vibrating the bonds.
A method to react two compounds together by vibrating the molecules.
What is photoluminescence?
Any emission of light after chemical reaction
Any emission of light after absorption of light
Any absorption of light
Any absorption of light from excited electrons
Arrange the following process of spectrophotometer sequentially.
1. Collimator narrows the beam of light.
2. Beams are then transmitted by the monochromator for alignment.
3. A detector identifies the amount of absorbed light.
4. Light enters the device by an entrance slit.
5. The desired wavelength will be transmitted that will pass through the cuvette.
1,2,4,5,3
4,3,5,2,1
4,1,2,5,3
1,3,4,2,5
Emission of light from an atom occurs when an electron____________.
drops from a higher to a lower energy level.
jumps from a lower to a higher energy level.
moves within its atomic orbital.
falls into the nucleus.
