Analytical instruments/Analytical Instrumentation MCQ Question Set 13 Sample Test,Sample questions

Question:
 Auger electron spectroscopy involves the irradiation of the surface to be analysed with a beam of electrons of energy in the _________ range.

1.1-2 KeV

2. 2-4 KeV

3. 4-8 KeV

4.1-8 KeV


Question:
 Double-pass cylindrical mirror energy analyser has how many mirrors?

1. One

2. Two

3.Three

4.four


Question:
 Electron ionization can produce which of the following?

1.ESCA electron

2.Auger electron

3. Ion

4.Photon


Question:
 In Auger process, an electron drops to fill which of the following?

1.1s hole

2. 1p hole

3.2s hole

4.2p hole


Question:
532.5 eV matches which of the following specific atom type?

1.Carbon

2.Oxygen

3.Nitrogen

4.Argon


Question:
A basic X-ray source includes which of the following components?

1.Large target anode

2.Large target cathode

3.Small target anode

4.Small target cathode


Question:
AES is limited when it comes to very high resolution studies.

1. True

2.False

3.all of the above

4.None of the mentioned


Question:
AES is more sensitive than XPS because of which of the following factors?

1.Binding energies of electrons

2. Kinetic energies of electrons

3.Mass of electrons

4.Mass to charge ratio of electrons


Question:
Auger electron spectroscopy can be used for surface chemical analysis in a way similar to which of the following?

1.ESCA

2. SIMS

3. ISS

4.Ion spectroscopy


Question:
Both ISS and SIMS have depth profiling capability.

1.True

2.False

3.all of the above

4.None of the mentioned


Question:
By studying which of the following can we determine if the surface corresponds to C-O or C=O chemical form?

1.Mass of the electron

2.Energy of the carbon peak

3.Binding energy

4.Charge of electron


Question:
Charging effect can be suppressed by supplying flood of electrons having which of the following?

1. Uniform low energy

2.Uniform low mass

3.Uniform high energy

4.Uniform high mass


Question:
Electron detector has a _______ doped glass tube with a secondary semiconducting coating.

1.Quartz

2.Silica

3.Lead

4.Cesium


Question:
Electron ionisation can produce ESCA electrons.

1.True

2.False

3.all of the above

4.None of the mentioned


Question:
How is the specificity of Auger electron spectroscopy?

1.Very bad

2.Bad

3.Good

4.Very good


Question:
If the primary ion is elastically scattered, the kinetic energy of the reflected primary ion will depend on which of the following?

1.Charge of the primary ion

2. Charge of the surface ion

3.Mass of the surface ion

4.Number of surface ions


Question:
In Auger spectroscopy, beam currents are typically _____ in a beam of diameter 0.5mm.

1.5-10 µA

2.5-20 µA

3.5-30 µA

4.5-50 µA


Question:
In ESCA process, the photon ejects which of the following?

1.1s electron

2.1p electron

3.2s electron

4.2p electron


Question:
In ion spectroscopy, the positive ions are focussed on the sample at which of the following angles?

1.20o

2.30o

3.45o

4.90o


Question:
In Ion spectroscopy, the primary ion is usually which of the following?

1. Inert gas ion

2.Halogen ion

3.Oxygen group gas ion

4.Hydrogen


Question:
In order to obtain ISS spectra, the backscattered primary ions are sampled by which of the following?

1.Faraday cup analyser

2.Photographic analyser

3.Micro-channel analyser

4.Cylindrical mirror analyser


Question:
In spherical sector analyser, ____ is detected and plotted as a function of energy.

1. Mass

2.Charge

3.Number of electrons striking the detector

4.Mass to charge ratio of electrons


Question:
Magnetic deflection energy analysers are effective than electrostatic types.

1.True

2.False

3.all of the above

4.None of the mentioned


Question:
Only those electrons which are in a selected small solid angle are received in the ________ electrostatic analyser.

1.100o

2.127o

3.180o

4.263o


Question:
Qualitative chemical analysis is very often performed using which of the following?

1.ESCA

2.SIMS

3.AES

4. Ion spectroscopy


Question:
Synchroton radiation has several advantages over conventional radiation.

1.True

2.False

3.all of the above

4.None of the mentioned


Question:
The anode is held at __________ positive potential and the filament is held at ____________ potential.

1.High, ground

2.Ground, high

3. Low, high

4.High, low


Question:
The characterisation of auger spectroscopy can be achieved up to which of the following depths?

1.1 nm

2.2 nm

3.4 nm

4.8 nm


Question:
The fragments formed during sputtering can be either neutral atoms or ions. The ions can only be positive.

1.True

2.False

3.all of the above

4.None of the mentioned


Question:
The kinetic energy of the primary ion should be in which of the following range?

1.0.1-4 keV

2.0.2-1 keV

3.0.4-2 keV

4.0.3-5 keV


Question:
The output of the multiplier is fed to which of the following immediately?

1.Pulse amplifier discriminator

2.DAC

3.ADC

4.Multichannel analyser


Question:
Which is the most intense line in the X-ray spectrum?

1.Kα1

2. Kα2

3. Kα12

4.Kα22


Question:
Which of the following can be used as the detector in ion spectroscopy?

1. Faraday cup collector

2.Channel electron multiplier

3.Micro-channel plate

4.Flame ionization detector


Question:
Which of the following causes the phenomena of sputtering?

1.Primary ion gets embedded in the solid

2.Primary ion is elastically scattered

3. Primary ion is reflected

4.Primary ion is refracted


Question:
Which of the following denotes the sample destruction that occurs in Auger electron spectroscopy?

1.None in 95% of sample

2.None in 99% of sample

3.None in 100% of sample

4.Frequent


Question:
Which of the following is an Auger transition starting from a hole in 1s levels which would be filled up from the 2p level?

1.KLM transition

2.KLL transition

3.LMN transition

4.LLM transition


Question:
Which of the following is denotes the absolute quantitative analysis of SIMS?

1.30%

2.70%

3.50%

4.Not possible


Question:
Which of the following is one of the most commonly used anode material?

1. Carbon

2.Tungsten

3. Magnesium

4.Cesium


Question:
Which of the following is the amount of matrix effect that occurs in SIMS?

1.Very low

2.Low

3. Some

4.Severe


Question:
Which of the following is the detection limit of Auger Electron Spectroscopy?

1.0.1% monolayer

2.0.5% monolayer

3.1% monolayer

4.2% monolayer


Question:
Which of the following is the detection limit of ESCA?

1. 0.1% monolayer

2. 0.5% monolayer

3.1% monolayer

4.2% monolayer


Question:
Which of the following is the energy after collision with a surface atom for a scattering angle of 90o when Eo is the energy of the incident ion, M1 is the mass of the incident ion and M2 is the mass of the target surface?

1.Eo(M2-M1)/(M2+M1)

2.Eo(M2+M1)/(M2-M1)

3.Eo(M2×M1)/(M2+M1)

4.Eo(M2-M1)/(M2×M1)


Question:
Which of the following is the energy range of ISS?

1.1 keV

2. 2 keV

3.4 keV

4.8 keV


Question:
Which of the following is the ideal vacuum for electron spectrometers?

1.10-6 torr

2.10-7 torr

3.10-8 torr

4.10-9 torr


Question:
Which of the following is the most commonly used detector in ESCA and AES?

1.Electron multiplier

2.Dynodes

3.Photovoltaic cell

4.Photomultiplier


Question:
Which of the following is the most commonly used magnetic shielding?

1.Helmholtz coils

2.Ferro-magnetic shielding

3. Faraday shield

4.Magnetometer probe


Question:
Which of the following is the spectral range of SIMS?

1. 0-10 amu

2.0-100 amu

3.0-500 amu

4. 0-1000 amu


Question:
Which of the following is the x-y resolution of ISS?

1.1 µ

2.10 µ

3.100 µ

4. 1000 µ


Question:
Which of the following is the x-y resolution of SIMS?

1. 1 µ

2.10 µ

3. 100 µ

4.1000 µ


Question:
Which of the following must be used with the X-ray source to have high energy resolution?

1.Chopper

2.Vacuum chamber

3.Accelerator

4.Monochromator


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