A magnetic sector alone can be used as a mass spectrometer, with roughly _____ resolution.
1.Low
2.High
3. Unit
4.infinite
Posted Date:-2022-04-20 07:12:46
Discrete electrons cannot be observed in electron ionization of an atom due to which of the following reasons?
1. Environmental disturbances
2.Same mass
3.Same charge
4.Electron- electron interaction
Posted Date:-2022-04-20 07:27:38
Electron spectroscopy is based on the ionization phenomenon.
1.True
2.False
3.all of the above
4.None of the mentioned
Posted Date:-2022-04-20 07:25:08
ESCA can identify elements in the periodic table above which of the following?
1.Carbon
2.Boron
3.Helium
4.Potassium
Posted Date:-2022-04-20 07:27:15
ESCA gives sufficient chemical information up to a depth about ________ armstrong in oxide.
1. 5-20
2.15-40
3. 40-100
4.100-200
Posted Date:-2022-04-20 07:26:48
In reverse-geometry mass spectrometer which of the following precedes the electric sector?
1. Nebulizer
2.Orifice
3.Magnetic sector
4.Mass spectrometer
Posted Date:-2022-04-20 07:12:19
In tandem spectroscopy, the first stage sepatation device is a mass spectrometer.
1. True
2.False
3.all of the above
4.None of the mentioned
Posted Date:-2022-04-20 07:10:33
Introduction of total HPLC effluent into MS is feasible.
1.True
2.False
3.all of the above
4.None of the mentioned
Posted Date:-2022-04-20 07:05:22
The system for measurement of ion intensity in GS-MS system consists of which of the following?
1.Electrometer
2.Ion meter
3. Ion transducer
4.Intensity meter
Posted Date:-2022-04-20 07:03:32
Which of the following should be in a position to split the effluent?
1. Interface
2.Ion source
3.Makeup gas
4.Microbore
Posted Date:-2022-04-20 07:06:17
284.6 eV matches which of the following specific atom type?
1.Carbon
2.Oxygen
3.Nitrogen
4.Argon
Posted Date:-2022-04-20 07:29:16
A tandem mass spectrometer has which of the following analysers?
1. Time of flight mass analyser
2. Magnetic deflection analyser
3.Radiofrequency analyser
4.Quadrupole analyser
Posted Date:-2022-04-20 07:14:37
All ions with the same number of charges will have ______
1.Same kinetic energy
2.Different kinetic energies
3.Same mass
4.Different mass
Posted Date:-2022-04-20 07:14:10
B/E scan is which of the following scans?
1.Product ion scan
2. Precursor ion scan
3. Mass scan
4.Charge scan
Posted Date:-2022-04-20 07:15:22
ESCA focusses on which of the following information?
1.Mass of the electron
2.Charge of the electron
3. Binding energy of the electron
4.Mass of atoms
Posted Date:-2022-04-20 07:28:17
ESCA gives sufficient chemical information up to a depth about ________ armstrong in metals.
1.5-20
2.15-40
3.40-100
4.100-200
Posted Date:-2022-04-20 07:25:58
ESCA gives sufficient chemical information up to a depth about ________ armstrong in polymers.
1. 5-20
2.15-40
3.40-100
4.100-200
Posted Date:-2022-04-20 07:26:23
Gas burden from conventional LC flow rates is which of the following?
1.1ml/min of water produces 1.2 l/mm of gas
2.1ml/min of water produces 2.4 l/mm of gas
3.2ml/min of water produces 3.2 l/mm of gas
4. 1ml/min of water produces 4.2 l/mm of gas
Posted Date:-2022-04-20 07:09:37
In MIKES experiments which of the following are measured?
1.Product ions
2.Product ion kinetic energies
3. Product ions mass to charge ratio
4.Product ions masses
Posted Date:-2022-04-20 07:13:35
In surface spectrometer, which of the following beam is analysed?
1.Reflected beam
2.Absorbed beam
3.Refracted beam
4. Incident beam
Posted Date:-2022-04-20 07:19:19
In the spectrum, two main peaks at _________ and ________ are observed.
1.284.6, 532.5
2. 248.6, 523.5
3. 264.8, 535.2
4.246.8, 553.2
Posted Date:-2022-04-20 07:28:43
Ion etching techniques provides the depth profiling from the surface.
1.True
2.False
3.all of the above
4.None of the mentioned
Posted Date:-2022-04-20 07:23:08
Only ______ percent of the effluent of the liquid chromatography must be introduced in the mass spectrometer.
1.1-2 %
2.1-5 %
3. 1-20 %
4.1-15 %
Posted Date:-2022-04-20 07:07:18
Surface analysis can provide information that classic methods like microscopic cannot.
1.True
2.False
3.all of the above
4.None of the mentioned
Posted Date:-2022-04-20 07:18:53
Surface analysis cannot provide any chemical information directly.
1.True
2.False
3.all of the above
4.None of the mentioned
Posted Date:-2022-04-20 07:20:02
Surface is usually more than _____ atomic layer deep and is a region of ________ atomic potentials.
1.One, uniform
2.One, non-uniform
3.Two, uniform
4.Two, non-uniform
Posted Date:-2022-04-20 07:18:07
Tandem mass spectroscopy combines which of the following devices?
1. Mass spectrometer and gas-solid chromatograph
2.Mass spectrometer and gas-liquid chromatograph
3. Mass spectrometer and gas chromatograph
4.Mass spectrometer and mass spectrometer
Posted Date:-2022-04-20 07:10:14
The carrier gas with low molecular weight would diffuse at a higher rate than the higher molecular weight sample.
1.True
2.False
3.all of the above
4.None of the mentioned
Posted Date:-2022-04-20 07:02:34
The final MS/MS spectrum consists only of product ions from the selected precursor.
1. True
2.False
3.all of the above
4.None of the mentioned
Posted Date:-2022-04-20 07:11:49
The gas burden from conventional LC flow rates creates nearly _____ times more gas than cryo-pumped vacuum system can handle.
1.5
2.10
3.20
4.40
Posted Date:-2022-04-20 07:05:48
The ions are focussed and de-clustered through which of the following regions?
1.Dry helium region
2.Wet oxygen region
3.Wet chlorine region
4.Dry nitrogen region
Posted Date:-2022-04-20 07:08:11
The ions are passed into the high vacuum analyser through which of the following?
1. Orifice
2.Nozzle
3.Nebulizer
4. Venturi tube
Posted Date:-2022-04-20 07:08:42
The kinetic energy of the ejected photoelectron is dependent upon the energy of which of the following?
1. Ions around
2.Photons around
3.Material
4.Impinging photon
Posted Date:-2022-04-20 07:25:32
The kinetic energy of the photoelectron energies is dependent on _________ of the atom, which makes XPS useful to identify the oxide state.
1.Mass
2.Charge
3.Chemical environment
4.Volume
Posted Date:-2022-04-20 07:22:50
The mass-selected ions are activated in which of the following ways that cause them to fall apart to produce product ions?
1.Collisional activation
2.Evaporational activation
3.Inert gas activation
4.Thermal activation
Posted Date:-2022-04-20 07:11:27
Using an interface would reduce detection limit and sensitivity.
1.True
2.False
3.all of the above
4.None of the mentioned
Posted Date:-2022-04-20 07:09:08
What does the acronym ‘MIKES’ stand for?
1.Mass-analysed ion kinetic energy spectrometer
2.Mass-based induced kinetic energy spectrometer
3.Mass invasive kinetic electric spectrometer
4.Mass-analyser in a kinetic energy-type spectrometer
Posted Date:-2022-04-20 07:13:11
Which of the following filters are used in tandem spectrometer?
1.Quadrupole mass filter
2. Low energy filter
3. High energy filter
4.Time of flight mass filter
Posted Date:-2022-04-20 07:14:57
Which of the following is a type of electron spectroscopy?
1.MIKES
2.Auger spectroscopy
3.Secondary ion mass spectroscopy
4.Ion scattering spectroscopy
Posted Date:-2022-04-20 07:19:45
Which of the following is also known as X-ray photoelectron spectroscopy?
1.Auger electron spectroscopy
2. Electron impact spectroscopy
3. Electron spectroscopy for chemical analysis
4. Secondary ion mass spectroscopy
Posted Date:-2022-04-20 07:20:28
Which of the following is located in the region between two analysers?
1. Nebuliser
2.Collision cell
3. Filter
4.Vacuum chamber
Posted Date:-2022-04-20 07:15:55
Which of the following is the abbreviation of ESCA?
1. Electron scattering chemical analysis
2.Emission spectroscopy combination analysis
3.Electron spectroscopy for chemical analysis
4. Electron spectrum chemically analysed
Posted Date:-2022-04-20 07:21:17
Which of the following is the abbreviation of SIMS?
1. Secondary ion mass spectroscopy
2.Spectrum ionization mass spectroscopy
3. Scattering ions mass spectroscopy
4.Spectral ionization mass spectroscopy
Posted Date:-2022-04-20 07:22:12
Which of the following is the most commonly used interface?
1.Nebulizer
2.Chopper
3.Filter
4.Vapourising chamber
Posted Date:-2022-04-20 07:06:47
Which of the following is the normal nebuliser temperature used in LC mass spectrometry?
1. 50-100oC
2.100-200oC
3.125-150oC
4. 150-200oC
Posted Date:-2022-04-20 07:07:45
Which of the following is the type of separator used in commercial GC-MS systems?
1. Jet type molecular separator
2.Porous tube
3. Teflon tube
4. Flow type separator
Posted Date:-2022-04-20 07:03:03
Which of the following is used to separate a single mass that is characteristic of a given analyte in a mixture?
1.First mass spectrometer
2.Second mass spectrometer
3.Filter
4.Precursor
Posted Date:-2022-04-20 07:11:01
Which of the following methods use soft X-rays to eject electrons from inner shell orbitals?
1.Auger electron spectroscopy
2.Electron impact spectroscopy
3.Electron spectroscopy for chemical analysis
4.Secondary ion mass spectroscopy
Posted Date:-2022-04-20 07:21:45
Which of the following methods utilizes the emission of low energy electrons in a process?
1.Auger electron spectroscopy
2.Electron impact spectroscopy
3. Electron spectroscopy for chemical analysis
4.Secondary ion mass spectroscopy
Posted Date:-2022-04-20 07:20:50
Which of the following problems occur when combining gas chromatography and mass spectroscopy?
1.Difference in operating pressures
2. Reduction in sensitivity
3.Direct identification is not possible
4.It does not permit direct introduction of the effluent
Posted Date:-2022-04-20 07:02:08