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Chemical Technician (Analytical Chemistry) > Mass Spectrometer > Flashcards

Mass Spectrometer Flashcards

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1
Q
  1. Mass spectrometers are used to determine which of the following?
    a) Composition in sample
    b) Concentration of elements in sample
    c) Relative mass of atoms
    d) Properties of sample
A

c) Relative mass of atoms

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2
Q
  1. Who invented mass spectrometers?
    a) J.J Thompson
    b) Goldstein
    c) Nikola Tesla
    d) Aston
A

v

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3
Q
  1. In mass spectrometer, the ions are sorted out in which of the following ways?
    a) By accelerating them through electric field
    b) By accelerating them through magnetic field
    c) By accelerating them through electric and magnetic field
    d) By applying a high voltage
A

c) By accelerating them through electric and magnetic field

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4
Q
  1. In mass spectrometer, the sample that has to be
    analysed is bombarded with which of the following?
    a) Protons
    b) Electrons
    c) Neutrons
    d) Alpha particles
A

b) Electrons

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5
Q
  1. Mass spectrometer separates ions on the basis of which of the following?
    a) Mass
    b) Charge
    c) Molecular weight
    d) Mass to charge ratio
A

d) Mass to charge ratio

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6
Q
  1. No two molecules will be fragmented and ionized in
    exactly the same manner.
    a) True
    b) False
A

a) True

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7
Q
  1. The procedure for mass spectroscopy starts with which of the following processes?
    a) The sample is bombarded by electron beam
    b) The ions are separated by passing them into electric and magnetic field
    c) The sample is converted into gaseous state
    d) The ions are detected
A

c) The sample is converted into gaseous state

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8
Q
  1. In a mass spectrometer, the ion currents are measured using which of the following?
    a) Scintillation counter
    b) Ion counter
    c) Electrometer tube
    d) Electric fields
A

c) Electrometer tube

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9
Q
  1. Which of the following ions pass through the slit and
    reach the collecting plate?
    a) Negative ions of all masses
    b) Positive ions of all masses
    c) Negative ions of specific mass
    d) Positive ions of specific mass
A

d) Positive ions of specific mass

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10
Q
  1. In mass spectrometer, the sample gas is introduced into the highly evacuated spectrometer tube and it is ionised by electron beam.
    a) True
    b) False
A

a) True

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11
Q
  1. Which of the following statements is not true about
    mass spectrometry?
    a) Impurities of masses different from the one being
    analysed interferes with the result
    b) It has great sensitivity
    c) It is suitable for data storage
    d) It is suitable for library retrieval
A

a) Impurities of masses different from the one being
analysed interferes with the result

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12
Q
  1. Which of the following is not a component of mass
    spectrometer?
    a) Inlet system
    b) Sweep generator
    c) Ion transducer
    d) Mass analyser
A

b) Sweep generator

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13
Q
  1. Inlet system is also known as which of the following?
    a) Initial system
    b) Sample reservoir
    c) Sample handling system
    d) Element injection system
A

c) Sample handling system

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14
Q
  1. Which of the following can be introduced into the
    ionization chamber directly?
    a) Solid samples with low vapour pressure
    b) Solid samples with high vapour pressure
    c) Liquid samples with low density
    d) Liquid samples with high density
A

a) Solid samples with low vapour pressure

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15
Q
  1. Which of the following is normally done to convert the
    sample into the gaseous state?
    a) Sample is pressurized
    b) Chemical reactions are made to occur
    c) Sample is heated
    d) Sample is cooled
A

c) Sample is heated

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16
Q
  1. Which of the following probes are used for the
    introduction of the sample?
    a) Silica
    b) Quartz
    c) Graphite
    d) Silver
A

a) Silica

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17
Q
  1. Which of the following is not a type of ionisation?
    a) Field ionisation
    b) Spontaneous ionisation
    c) Spark ionisation
    d) Chemical ionisation
A

b) Spontaneous ionisation

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18
Q
  1. Mass analyser is similar to which of the following in
    optical spectrometer?
    a) Source
    b) Monochromator
    c) Detector
    d) Sample
A

b) Monochromator

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19
Q
  1. Which of the following is not one of the types of mass analyser?
    a) Magnetic sector analyser
    b) Frequency sweep analyser
    c) Double focussing spectrometer
    d) Time of flight analyser
A

b) Frequency sweep analyser

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20
Q
  1. Which of the following is not a type of ion detector used in mass spectrometers?
    a) Electron multiplier
    b) Flame emission detector
    c) Faraday cup collector
    d) Photographic plates
A

b) Flame emission detector

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21
Q
  1. Under which of the following temperatures is the
    ionisation chamber maintained?
    a) 100oC
    b) 200oC
    c) 300oC
    d) 400oC
A

c) 300oC

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22
Q
  1. Which of the following is used to inject liquid samples?
    a) Hypodermic needle
    b) Glass bulb
    c) Capillary tube
    d) Curvette
A

a) Hypodermic needle

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23
Q
  1. Which of the following is not a characteristic of
    nebulizers that are commonly used?
    a) Low cost
    b) Low uptake rate
    c) High efficiency
    d) High uptake rate
A

d) High uptake rate

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24
Q
  1. In glow discharge ion source, the sample is atomised by which of the following process?
    a) Evaporation
    b) Sputtering
    c) Heating
    d) Annealing
A

b) Sputtering

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25
Q
  1. Which of the following produces the electron beam in magnetic deflection mass spectrometer?
    a) Tungsten filament
    b) Quartz rod
    c) Silica
    d) Rhodium filament
A

a) Tungsten filament

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26
Q
  1. In magnetic deflection mass spectrometer, in which of the following ways is acceleration applied to the direction of motion?
    a) In random manner
    b) Parallel to it
    c) Perpendicular to it
    d) Along it
A

c) Perpendicular to it

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27
Q
  1. Which of the following separate the ions according to their mass-to-charge?
    a) Ion source
    b) Detector
    c) Magnetic sector
    d) Electric sector
A

c) Magnetic sector

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28
Q
  1. The electric sector field is not subject to hysteresis.
    a) True
    b) False
A

a) True

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29
Q
  1. Direct focussing is obtained by deflecting the ion beam along a _________ trajectory through the magnetic field.
    a) 120o
    b) 150o
    c) 190o
    d) 180o
A

d) 180o

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30
Q
  1. Mattauch-Herzog geometry involves a deflection of
    which of the following radians in a radial electrostatic field analyser?
    a) √2Π
    b) Π/2
    c) Π/3√4
    d) Π/4√2
A
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31
Q
  1. Which of the following leads to the limitation of
    resolution?
    a) All ions do not have same energy
    b) All ions do not have same charge
    c) All ions are not of the same size
    d) All ions do not have the same charge
A

d) All ions do not have the same charge

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32
Q
  1. Which of the following components need to be added in order to increase the resolution?
    a) Ion source
    b) Detector
    c) Magnetic sector
    d) Electric sector
A

a) Ion source

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33
Q
  1. Which of the following is commonly varied in magnetic deflection mass spectrometer?
    a) Electric sector
    b) Magnetic fold strength
    c) Magnetic constant
    d) Electric constant
A

b) Magnetic fold strength

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34
Q
  1. Nier-Johnson geometry involves a deflection of which of the following radians in a radial electrostatic field analyser?
    a) Π
    b) Π/2
    c) Π/3
    d) Π/4
A

b) Π/2

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35
Q
  1. An accuracy of 1 part in 102 has been obtained in
    precision mass measurements.
    a) True
    b) False
A

b) False

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36
Q
  1. Which of the following is not a component of the time of flight analyser spectrometer?
    a) Ion source
    b) Field free separation region
    c) Electron multiplication region
    d) Photo tube
A
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37
Q
  1. Which of the following is not a component of the time of flight analyser spectrometer?
    a) Ion source
    b) Field free separation region
    c) Electron multiplication region
    d) Photo tube
A

a) Ion source

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38
Q
  1. Which of the following is not an advantage of mass
    spectrometer?
    a) Simple
    b) Rugged
    c) High sensitivity
    d) Unlimited mass range
A

c) High sensitivity

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39
Q
  1. All the ions entering the tube have the same kinetic
    energy.
    a) True
    b) False
A

a) True

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40
Q
  1. If all the ions have the same kinetic energy how are their masses related to their velocities?
    a) Mass and velocity are equal
    b) Mass and velocity are not related
    c) Mass and velocity are directly proportional
    d) Mass and velocity are inversely proportional
A

d) Mass and velocity are inversely proportional

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41
Q
  1. Which of the following is true about time of flight
    analyser spectrometers?
    a) Lighter particles arrive at the detector earlier
    b) Heavier particle arrive at the detector earlier
    c) Lighter and heavier particles arrive together at the
    detector
    d) Lighter particles do not reach the detector
A

a) Lighter particles arrive at the detector earlier

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42
Q
  1. In the time of flight mass spectrometer, ions are formed by which of the following methods?
    a) Pulsed ionization method
    b) Acceleration method
    c) Dynamic method
    d) Ion excitation method
A

a) Pulsed ionization method

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43
Q
  1. The evacuated tube is also known as which of the
    following?
    a) Pulse tube
    b) Detector tube
    c) Drift tube
    d) Acceleration tube
A

c) Drift tube

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44
Q
  1. The current produced by ions arriving at the collector necessitates the use of which of the following?
    a) Wide band amplifier
    b) Narrow band amplifier
    c) Wide band filter
    d) Narrow band filter
A

a) Wide band amplifier

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45
Q
  1. Which of the following is an ion optic device in which ions pass through a mirror and their flight is reversed?
    a) Reversal device
    b) Reflectron
    c) Mirror arrangement
    d) Separation chamber
A

b) Reflectron

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46
Q
  1. Which of the following statements about mass
    spectrometers are not true?
    a) Time of flight mass spectrometer has the ability to
    record the entire mass spectrum at a time
    b) Time of flight mass spectrometers have poor resolution
    c) Conventional spectrometer detects only one peak at a time
    d) All spectrometers have the ability to record the entire mass spectrum at a time
A

d) All spectrometers have the ability to record the entire mass spectrum at a time

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47
Q
  1. Which of the following is placed just before the detector in a radiofrequency mass spectrometer?
    a) Ion source
    b) Potential energy selector
    c) Ionisation chamber
    d) Reflectron
A

b) Potential energy selector

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48
Q
  1. Which of the following is placed just before the detector in a radiofrequency mass spectrometer?
    a) Ion source
    b) Potential energy selector
    c) Ionisation chamber
    d) Reflectron
A

c) Ionisation chamber

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49
Q
  1. The alternating voltage rf voltage is applied to which of the following?
    a) All grids
    b) Central grid
    c) Alternate grids
    d) None of the grids
A

b) Central grid

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50
Q
  1. The rf spectrometer contains a magnet.
    a) True
    b) False
A

b) False

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51
Q
  1. The DC ion accelerating voltage is swept from
    _________
    a) 0 to 50 V
    b) 50 to 100 V
    c) 200 to 300 V
    d) 50 to 250 V
A

d) 50 to 250 V

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52
Q
  1. In Bennet spectrometer, the rf voltage has a fixed
    frequency.
    a) True
    b) False
A

a) True

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53
Q
  1. The resolution of the Bennet tube can be improved by using which of the following?
    a) Sine wave rf signal
    b) Square wave rf signal
    c) Triangular wave rf signal
    d) Random signal
A

b) Square wave rf signal

54
Q
  1. The spurious lines can be reduced to a minimum by
    using which of the following?
    a) Single stage tube
    b) Two stage tube
    c) Three stage tube
    d) Reflectron
A

c) Three stage tube

55
Q
  1. Which of the following is not the feature of Bennet
    type spectrometer?
    a) Lightweight
    b) Simple
    c) Absence of spurious lines
    d) Moderate resolution
A

c) Absence of spurious lines

56
Q
  1. Which of the following is the disadvantage of using
    three stage tubes?
    a) Reduced resolution
    b) Bulky construction
    c) Complex
    d) Heavy
A

a) Reduced resolution

57
Q
  1. Which of the following is not a feature of quadrupole mass spectrometer?
    a) Low cost
    b) Light weight
    c) Low speed electronic scanning
    d) Simple in construction
A

c) Low speed electronic scanning

58
Q
  1. Which of the following is not a component of
    quadrupole mass filter?
    a) Electrodes
    b) Choke
    c) DC potential
    d) Detector
A

d) Detector

59
Q
  1. The resolving power of Bennet type spectrometer is primarily based on which of the following?
    a) Distance between detector and reflectron
    b) Difference between the individual rf accelerating stages
    c) Length of the drift tube
    d) Laser beam used
A

b) Difference between the individual rf accelerating stages

60
Q
  1. The mass selection scheme uses a dc potential and not a radio frequency potential.
    a) True
    b) False
A

b) False

61
Q
  1. If to one pair of electrodes one potential with one sign is applied, which of the following is applied to the other pair of electrodes?
    a) Same potential with same sign
    b) Different potential with same sign
    c) Different potential with different sign
    d) Same potential with different sign
A

d) Same potential with different sign

62
Q
  1. Which of the following is the heart of quadrupole
    instrument?
    a) Electrodes
    b) Choke
    c) DC potential
    d) Detector
A

a) Electrodes

63
Q
  1. Which of the following does not affect the resolution of the instrument?
    a) Changing length of electrode
    b) Changing slope of scan line
    c) Quality of machining of the rods
    d) Changing length of drift tube
A

d) Changing length of drift tube

64
Q
  1. Which of the following has to be done to increase the resolution of the quadrupole mass spectrometer?
    a) Increasing distance between detector and reflectron
    b) Increasing difference between the individual rf
    accelerating stages
    c) Increasing the length of the drift tube
    d) Increasing the rod length of the electrode
A

d) Increasing the rod length of the electrode

65
Q
  1. In cases where differentiation is required between very similar substances, which of the following techniques making use of quadrupole principle is preferred?
    a) Evaporation mass spectrometry
    b) Pyrolysis mass spectrometry
    c) Plasma mass spectrometry
    d) Trapped ion mass spectrometry
A

b) Pyrolysis mass spectrometry

66
Q
  1. Which of the following is used to cool the ion source?
    a) Liquid sodium shield
    c
    c) Water
    d) Freon
A

a) Curie point

67
Q
  1. In pyrolysis spectrometry, heating is done until which of the following is reached?
    a) Curie point
    b) Boiling point
    c) Until production of superheated vapour
    d) Until 100oC
A

a) Curie point

68
Q
  1. In quadrupole mass spectrometer, the ratio u/v is mass dependent, where ‘u’ is the DC voltage and ‘v’ is the peak amplitude.
    a) True
    b) False
A

b) False

69
Q
  1. When a value of q is kept constant, the value of m/e is proportional to which of the following when ‘m’ is the mass number, ‘e’ is the electric charge, ‘u’ is the DC potential, ‘v’ is the peak amplitude and ‘f’ is the
    frequency?
    a) u/v ratio
    b) u
    c) v
    d) f
A

c) v

70
Q
  1. Which of the following is not an ion transducer or
    detector?
    a) Faraday cup collector
    b) Channeltron
    c) Micro-channel plate
    d) Flame ionization detector
A

d) Flame ionization detector

71
Q
  1. Which of the following is similar to photo multiplier
    transducer?
    a) Faraday cup collector
    b) Channeltron
    c) Micro-channel plate
    d) Electron multiplier transducer
A

d) Electron multiplier transducer

72
Q
  1. Which of the following is used in places where ion
    currents are very low?
    a) Faraday cup collector
    b) Channeltron
    c) Micro-channel plate
    d) Electron multiplier transducer
A

d) Electron multiplier transducer

73
Q
  1. Discrete type electron multiplier transducers can
    provide current gain upto which of the following?
    a) 10^2
    b) 10^5
    c) 10^7
    d) 10^11
A

c) 10^7

74
Q
  1. Continuous dynode electron multiplier transducer is a trumpet shaped device made with which of the following?
    a) Glass doped with lead
    b) Steel doped with bronze
    c) Phosphor bronze doped with iron
    d) Iron doped with calcium
A

a) Glass doped with lead

75
Q
  1. The potential maintained across the continuous dynode multiplier transducer is which of the following?
    a) 1 to 5kV
    b) 5 to 10kV
    c) 2.5 to 6.2kV
    d) 1.8 to 2kV
A

d) 1.8 to 2kV

76
Q
  1. Which of the following are true about dynodes used in discrete dynode electron multiplier?
    b) Successive dynodes are held at lower potential
    c) Successive dynodes are held at higher potential
    d) All dynodes are held at very low potential
A

c) Successive dynodes are held at higher potential

77
Q
  1. Which of the following is the least sensitive ion
    detector?
    a) Faraday cup collector
    b) Channeltron
    c) Micro-channel plate
    d) Electron multiplier transducer
A

a) Faraday cup collector

78
Q
  1. Which of the following are not the characteristics of an electron multiplier transducer?
    a) Rugged
    b) Reliable
    c) Microsecond of response time required
    d) High current gain
A

c) Microsecond of response time required

79
Q
  1. In which of the following detectors, the collector is
    placed in an inclined manner?
    a) Faraday cup collector
    b) Channeltron
    c) Micro-channel plate
    d) Electron multiplier transducer
A

a) Faraday cup collector

80
Q
  1. Photographic plates have greater sensitivity and
    resolution than electron multipliers.
    a) True
    b) False
A

a) True

81
Q
  1. Photographic plates are coated with which of the
    following?
    a) Lead
    b) Quartz
    c) Silver bromide
    d) Mercuric sulphate
A

c) Silver bromide

82
Q
  1. Which of the following detectors are well suited for
    spark source instruments?
    a) Faraday cup collector
    b) Photographic plates
    c) Micro-channel plate
    d) Electron multiplier transducer
A

b) Photographic plates

83
Q
  1. Which of the following detectors consist of an array of glass capillaries?
    a) Faraday cup collector
    b) Photographic plates
    c) Micro-channel plate
    d) Electron multiplier transducer
A

c) Micro-channel plate

84
Q
  1. Which of the following detectors can be used for ions with short life time?
    a) Faraday cup collector
    b) Photographic plates
    c) Micro-channel plate
    d) Electron multiplier transducer
A

b) Photographic plates

85
Q
  1. ICP’s principle is similar to which of the following?
    a) Flame emission spectroscopy
    b) Fourier transforms spectroscopy
    c) Atomic emission spectroscopy
    d) Absorption spectroscopy
A

c) Atomic emission spectroscopy

86
Q
  1. ICP is used to analyse samples in which of the following states?
    a) Solids
    b) Liquids
    c) Gases
    d) Solids and liquids
A

d) Solids and liquids

87
Q
  1. Solid samples are introduced into the ICP spectrometer using which of the following?
    a) Nebulizer
    b) Curvette having glass windows
    c) Probe
    d) Laser ablation system
A

d) Laser ablation system

88
Q
  1. Liquid samples are introduced into the ICP spectrometer using which of the following?
    a) Nebulizer
    b) Curvette having glass windows
    c) Probe
    d) Laser ablation system
A

a) Nebulize

89
Q
  1. Atomisation or ionisation occurs at which of the
    following conditions?
    a) Vacuum pressure
    b) Atmospheric pressure
    c) Low pressure
    d) High pressure
A

d) High pressure

90
Q
  1. Ions flow is pumped into the vacuum system using
    which of the following?
    a) Orifice
    b) Nozzle
    c) Venturi meter
    d) Dall tube
    View Answer
A

a) Orifice

91
Q
  1. Which of the following is not the characteristic of ICP
    spectrometer?
    a) Easy sample introduction
    b) It can trace multiple elements
    c) High detection limits
    d) Accurate
A

c) High detection limits

92
Q
  1. ICP spectrometer is a sequential multi-element analyser that has scan times less than ____ for one sweep.
    a) 10ms
    b) 20ms
    c) 50ms
    d) 100ms
A

b) 20ms

93
Q
  1. Double focussing section analysers offer better
    resolution than ICP spectrometry system.
    a) True
    b) False
A

a) True

94
Q
  1. The most common type of ion detector found in ICP system is which of the following?
    a) Faraday cup collector
    b) Channeltron
    c) Micro-channel plate
    d) Flame ionization detector
A

b) Channeltron

95
Q
  1. Which of the following is the most accurate method of determination of elemental composition?
    a) Spectroscopy
    b) Isotope dilution
    c) Isobar dilution
    d) Chromatography
A

b) Isotope dilution

96
Q
  1. Which of the following is the disadvantage of ICP mass spectroscopy?
    a) Incapable of multi-element analysis
    b) Less sensitivity
    c) Impossible to obtain isotopic information
    d) Not useful for detection of non-metals
A

d) Not useful for detection of non-metals

97
Q
  1. The isobaric interference is not caused in which of the following elements?
    a) Argon
    b) Oxygen
    c) Helium
    d) Nitrogen
A

c) Helium

98
Q
  1. Which of the following is the most sensitive of the
    spectral methods?
    a) Absorption spectroscopy
    b) Mass spectroscopy
    c) Flame emission spectroscopy
    d) Atomic emission spectroscopy
A

b) Mass spectroscopy

99
Q
  1. Which of the following is the disadvantage of gas
    chromatography?
    a) It is not a good method
    b) It cannot be used for qualitative analysis
    c) It cannot be used for the separation of volatile
    components
    d) It does not provide direct identification
A

d) It does not provide direct identification

100
Q
  1. Cold tray is provided for liquid N2 or CO2 but is used only for extremely small samples.
    a) True
    b) False
A

a) True

101
Q
  1. Which of the following is most often used in the
    chromatograph in gas chromatograph MS?
    a) Curvette
    b) Paper support
    c) Capillary tube
    d) Flask
A

c) Capillary tube

102
Q
  1. GC- MS has been developed for which of the following systems?
    a) Packed column
    b) Open tubular column
    c) Capillary column
    d) Porous layer column
A

a) Packed column

103
Q
  1. Which of the following problems occur when combining gas chromatography and mass spectroscopy?
    a) Difference in operating pressures
    b) Reduction in sensitivity
    c) Direct identification is not possible
    d) It does not permit direct introduction of the effluent
A

a) Difference in operating pressures

104
Q
  1. The carrier gas with low molecular weight would diffuse at a higher rate than the higher molecular weight sample.
    a) True
    b) False
A

a) True

105
Q
  1. Which of the following is the type of separator used in commercial GC-MS systems?
    a) Jet type molecular separator
    b) Porous tube
    c) Teflon tube
    d) Flow type separator
A

a) Jet type molecular separator

106
Q
  1. The system for measurement of ion intensity in GS-MS system consists of which of the following?
    a) Electrometer
    b) Ion meter
    c) Ion transducer
    d) Intensity meter
A

a) Electrometer

107
Q
  1. The system for measurement of ion intensity in GS-MS system consists of which of the following?
    a) Band pass amplifier
    b) Narrow band amplifier
    c) Wide band amplifier
    d) Low pass amplifier
A

c) Wide band amplifier

108
Q
  1. Introduction of total HPLC effluent into MS is feasible.
    a) True
    b) False
A

b) False

109
Q
  1. The gas burden from conventional LC flow rates creates nearly _____ times more gas than cryo-pumped vacuum system can handle.
    a) 5
    b) 10
    c) 20
    d) 40
A

c) 20

110
Q
  1. Which of the following should be in a position to split the effluent?
    a) Interface
    b) Ion source
    c) Makeup gas
    d) Microbore
A

a) Interface

111
Q
  1. Which of the following is the most commonly used
    interface?
    a) Nebulizer
    b) Chopper
    c) Filter
    d) Vapourising chamber
A

a) Nebulizer

112
Q
  1. Only ______ percent of the effluent of the liquid
    chromatography must be introduced in the mass
    spectrometer.
    a) 1-2 %
    b) 1-5 %
    c) 1-20 %
    d) 1-15%
A

b) 1-5 %

113
Q
  1. Which of the following is the normal nebuliser
    temperature used in LC mass spectrometry?
    a) 50-100oC
    b) 100-200oC
    c) 125-150oC
    d) 150-200oC
A

c) 125-150oC

114
Q
  1. The ions are focussed and de-clustered through which of the following regions?
    a) Dry helium region
    b) Wet oxygen region
    c) Wet chlorine region
    d) Dry nitrogen region
A

d) Dry nitrogen region

115
Q
  1. The ions are passed into the high vacuum analyser
    through which of the following?
    a) Orifice
    b) Nozzle
    c) Nebulizer
    d) Venturi tube
A

a) Orifice

116
Q
  1. Using an interface would reduce detection limit and
    sensitivity.
    a) True
    b) False
A

a) True

117
Q
  1. Gas burden from conventional LC flow rates is which of the following?
    a) 1ml/min of water produces 1.2 l/mm of gas
    b) 1ml/min of water produces 2.4 l/mm of gas
    c) 2ml/min of water produces 3.2 l/mm of gas
    d) 1ml/min of water produces 4.2 l/mm of gas
A

a) 1ml/min of water produces 1.2 l/mm of gas

118
Q
  1. Tandem mass spectroscopy combines which of the
    following devices?
    a) Mass spectrometer and gas-solid chromatograph
    b) Mass spectrometer and gas-liquid chromatograph
    c) Mass spectrometer and gas chromatograph
    d) Mass spectrometer and mass spectrometer
A

d) Mass spectrometer and mass spectrometer

119
Q
  1. In tandem spectroscopy, the first stage sepatation
    device is a mass spectrometer.
    a) True
    b) False
A

a) True

120
Q
  1. Which of the following is used to separate a single mass that is characteristic of a given analyte in a mixture?
    a) First mass spectrometer
    b) Second mass spectrometer
    c) Filter
    d) Precursor
A

a) First mass spectrometer

121
Q
  1. The mass-selected ions are activated in which of the
    following ways that cause them to fall apart to produce product ions?
    a) Collisional activation
    b) Evaporational activation
    c) Inert gas activation
    d) Thermal activation
A

a) Collisional activation

122
Q
  1. The final MS/MS spectrum consists only of product ions from the selected precursor.
    a) True
    b) False
A

a) True

123
Q
  1. In reverse-geometry mass spectrometer which of the following precedes the electric sector?
    a) Nebulizer
    b) Orifice
    c) Magnetic sector
    d) Mass spectrometer
A

c) Magnetic sector

124
Q
  1. A magnetic sector alone can be used as a mass
    spectrometer, with roughly _____ resolution.
    a) Low
    b) High
    c) Unit
    d) Infinite
A

c) Unit

125
Q
  1. What does the acronym ‘MIKES’ stand for?
    a) Mass-analysed ion kinetic energy spectrometer
    b) Mass-based induced kinetic energy spectrometer
    c) Mass invasive kinetic electric spectrometer
    d) Mass-analyser in a kinetic energy-type spectrometer
A

a) Mass-analysed ion kinetic energy spectrometer

126
Q
  1. In MIKES experiments which of the following are
    measured?
    a) Product ions
    b) Product ion kinetic energies
    c) Product ions mass to charge ratio
    d) Product ions masses
A

b) Product ion kinetic energies

127
Q
  1. All ions with the same number of charges will have
    __________
    a) Same kinetic energy
    b) Different kinetic energies
    c) Same mass
    d) Different mass
A

a) Same kinetic energy

128
Q
  1. A tandem mass spectrometer has which of the
    following analysers?
    a) Time of flight mass analyser
    b) Magnetic deflection analyser
    c) Radiofrequency analyser
    d) Quadrupole analyser
A

a) Time of flight mass analyser

129
Q
  1. Which of the following filters are used in tandem
    spectrometer?
    a) Quadrupole mass filter
    b) Low energy filter
    c) High energy filter
    d) Time of flight mass filter
A

a) Quadrupole mass filter

130
Q
  1. B/E scan is which of the following scans?
    a) Product ion scan
    b) Precursor ion scan
    c) Mass scan
    d) Charge scan
A

a) Product ion scan

131
Q
  1. Which of the following is located in the region
    between two analysers?
    a) Nebuliser
    b) Collision cell
    c) Filter
    d) Vacuum chamber
A

b) Collision cell

Chemical Technician (Analytical Chemistry) (16 decks)

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