R4RIN – MCQs, Mock Tests | Analytical instruments Analytical Instrumentation MCQ Question Set 12

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

✅ Correct Answer: 1

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

✅ Correct Answer: 1

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

✅ Correct Answer: 1

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

✅ Correct Answer: 1

Introduction of total HPLC effluent into MS is feasible.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

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

✅ Correct Answer: 3

Which of the following should be in a position to split the effluent?

1. Interface
2. Ion source
3. Makeup gas
4. Microbore

✅ Correct Answer: 1

Which of the following is the most commonly used interface?

1. Nebulizer
2. Chopper
3. Filter
4. Vapourising chamber

✅ Correct Answer: 1

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 %

✅ Correct Answer: 2

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

✅ Correct Answer: 3

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

✅ Correct Answer: 4

The ions are passed into the high vacuum analyser through which of the following?

1. Orifice
2. Nozzle
3. Nebulizer
4. Venturi tube

✅ Correct Answer: 1

Using an interface would reduce detection limit and sensitivity.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

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

✅ Correct Answer: 1

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

✅ Correct Answer: 4

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

✅ Correct Answer: 1

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

✅ Correct Answer: 1

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

✅ Correct Answer: 1

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

✅ Correct Answer: 1

In reverse-geometry mass spectrometer which of the following precedes the electric sector?

1. Nebulizer
2. Orifice
3. Magnetic sector
4. Mass spectrometer

✅ Correct Answer: 3

A magnetic sector alone can be used as a mass spectrometer, with roughly _____ resolution.

1. Low
2. High
3. Unit
4. infinite

✅ Correct Answer: 3

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

✅ Correct Answer: 1

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

✅ Correct Answer: 2

All ions with the same number of charges will have ______

1. Same kinetic energy
2. Different kinetic energies
3. Same mass
4. Different mass

✅ Correct Answer: 1

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

✅ Correct Answer: 1

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

✅ Correct Answer: 1

B/E scan is which of the following scans?

1. Product ion scan
2. Precursor ion scan
3. Mass scan
4. Charge scan

✅ Correct Answer: 1

Which of the following is located in the region between two analysers?

1. Nebuliser
2. Collision cell
3. Filter
4. Vacuum chamber

✅ Correct Answer: 2

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

✅ Correct Answer: 2

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

✅ Correct Answer: 1

In surface spectrometer, which of the following beam is analysed?

1. Reflected beam
2. Absorbed beam
3. Refracted beam
4. Incident beam

✅ Correct Answer: 1

Which of the following is a type of electron spectroscopy?

1. MIKES
2. Auger spectroscopy
3. Secondary ion mass spectroscopy
4. Ion scattering spectroscopy

✅ Correct Answer: 2

Surface analysis cannot provide any chemical information directly.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

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

✅ Correct Answer: 3

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

✅ Correct Answer: 1

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

✅ Correct Answer: 3

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

✅ Correct Answer: 3

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

✅ Correct Answer: 1

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

✅ Correct Answer: 3

Ion etching techniques provides the depth profiling from the surface.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Electron spectroscopy is based on the ionization phenomenon.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

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

✅ Correct Answer: 4

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

✅ Correct Answer: 1

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

✅ Correct Answer: 3

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

✅ Correct Answer: 2

ESCA can identify elements in the periodic table above which of the following?

1. Carbon
2. Boron
3. Helium
4. Potassium

✅ Correct Answer: 3

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

✅ Correct Answer: 4

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

✅ Correct Answer: 3

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

✅ Correct Answer: 1

284.6 eV matches which of the following specific atom type?

1. Carbon
2. Oxygen
3. Nitrogen
4. Argon

✅ Correct Answer: 1